A list of Free Software network services and web applications which can be hosted locally. Selfhosting is the process of hosting and managing applications instead of renting from Software-as-a-Service providers
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# Awesome-Selfhosted
[![Awesome](https://cdn.rawgit.com/sindresorhus/awesome/d7305f38d29fed78fa85652e3a63e154dd8e8829/media/badge.svg)](https://github.com/sindresorhus/awesome) [![](https://img.shields.io/travis/awesome-selfhosted/awesome-selfhosted/master?label=link%20checks)](https://github.com/awesome-selfhosted/awesome-selfhosted/issues/2266)
Self-hosting is the practice of locally hosting and managing applications instead of renting from [SaaSS](https://www.gnu.org/philosophy/who-does-that-server-really-serve.html) providers.
This is a list of [Free](https://en.wikipedia.org/wiki/Free_software) Software [network services](https://en.wikipedia.org/wiki/Network_service) and [web applications](https://en.wikipedia.org/wiki/Web_application) which can be hosted locally. Non-Free software is listed on the [Non-Free](non-free.md) page.
See [Contributing](.github/CONTRIBUTING.md).
## Table of contents
- [Software](#software)
- [Analytics](#analytics)
- [Archiving and Digital Preservation (DP)](#archiving-and-digital-preservation-dp)
- [Automation](#automation)
- [Blogging Platforms](#blogging-platforms)
- [Booking and Scheduling](#booking-and-scheduling)
- [Bookmarks and Link Sharing](#bookmarks-and-link-sharing)
- [Calendar & Contacts](#calendar--contacts)
- [Calendar & Contacts - CalDAV or CardDAV Servers](#calendar--contacts---caldav-or-carddav-servers)
- [Calendar & Contacts - CalDAV or CardDAV Web-based Clients](#calendar--contacts---caldav-or-carddav-web-based-clients)
- [Communication](#communication)
- [Communication - Custom Communication Systems](#communication---custom-communication-systems)
- [Communication - Email](#communication---email)
- [Communication - Email - Complete Solutions](#communication---email---complete-solutions)
- [Communication - Email - Mail Delivery Agents](#communication---email---mail-delivery-agents)
- [Communication - Email - Mail Transfer Agents](#communication---email---mail-transfer-agents)
- [Communication - Email - Mailing Lists and Newsletters](#communication---email---mailing-lists-and-newsletters)
- [Communication - Email - Webmail Clients](#communication---email---webmail-clients)
- [Communication - IRC](#communication---irc)
- [Communication - SIP](#communication---sip)
- [Communication - Social Networks and Forums](#communication---social-networks-and-forums)
- [Communication - XMPP](#communication---xmpp)
- [Communication - XMPP - Servers](#communication---xmpp---servers)
- [Communication - XMPP - Web Clients](#communication---xmpp---web-clients)
- [Community-Supported Agriculture (CSA)](#community-supported-agriculture-csa)
- [Conference Management](#conference-management)
- [Content Management Systems (CMS)](#content-management-systems-cms)
- [DNS](#dns)
- [Document Management](#document-management)
- [Document Management - E-books](#document-management---e-books)
- [Document Management - Institutional Repository and Digital Library Software](#document-management---institutional-repository-and-digital-library-software)
- [Document Management - Integrated Library Systems (ILS)](#document-management---integrated-library-systems-ils)
- [E-commerce](#e-commerce)
- [Federated Identity & Authentication](#federated-identity--authentication)
- [Feed Readers](#feed-readers)
- [File Transfer & Synchronization](#file-transfer--synchronization)
- [File Transfer - Distributed Filesystems](#file-transfer---distributed-filesystems)
- [File Transfer - Object Storage & File Servers](#file-transfer---object-storage--file-servers)
- [File Transfer - Peer-to-peer Filesharing](#file-transfer---peer-to-peer-filesharing)
- [File Transfer - Single-click & Drag-n-drop Upload](#file-transfer---single-click--drag-n-drop-upload)
- [File Transfer - Web-based File Managers](#file-transfer---web-based-file-managers)
- [Games](#games)
- [Gateways and Terminal Sharing](#gateways-and-terminal-sharing)
- [Genealogy](#genealogy)
- [Groupware](#groupware)
- [Human Resources Management (HRM)](#human-resources-management-hrm)
- [Internet of Things (IoT)](#internet-of-things-iot)
- [Knowledge Management Tools](#knowledge-management-tools)
- [Learning and Courses](#learning-and-courses)
- [Maps and Global Positioning System (GPS)](#maps-and-global-positioning-system-gps)
- [Media Streaming](#media-streaming)
- [Media Streaming - Audio Streaming](#media-streaming---audio-streaming)
- [Media Streaming - Multimedia Streaming](#media-streaming---multimedia-streaming)
- [Media Streaming - Audio Streaming](#media-streaming---audio-streaming)
- [Media Streaming - Multimedia Streaming](#media-streaming---multimedia-streaming)
- [Media Streaming - Video Streaming](#media-streaming---video-streaming)
- [Miscellaneous](#miscellaneous)
- [Money, Budgeting & Management](#money,-budgeting--management)
- [Monitoring](#monitoring)
- [Note-taking & Editors](#note-taking--editors)
- [Office Suites](#office-suites)
- [Password Managers](#password-managers)
- [Pastebins](#pastebins)
- [Personal Dashboards](#personal-dashboards)
- [Photo and Video Galleries](#photo-and-video-galleries)
- [Polls and Events](#polls-and-events)
- [Proxy](#proxy)
- [Read-it-later Lists](#read-it-later-lists)
- [Recipe Management](#recipe-management)
- [Resource Planning](#resource-planning)
- [Resource Planning - Enterprise Resource Planning](#resource-planning---enterprise-resource-planning)
- [Search Engines](#search-engines)
- [Self-hosting Solutions](#self-hosting-solutions)
- [Software Development](#software-development)
- [Software Development - API Management](#software-development---api-management)
- [Software Development - Bug Trackers](#software-development---bug-trackers)
- [Software Development - Continuous Integration & Deployment](#software-development---continuous-integration--deployment)
- [Software Development - Documentation Generators](#software-development---documentation-generators)
- [Software Development - FaaS & Serverless](#software-development---faas--serverless)
- [Software Development - IDE & Tools](#software-development---ide--tools)
- [Software Development - Localization](#software-development---localization)
- [Software Development - Project Management](#software-development---project-management)
- [Software Development - UX Testing](#software-development---ux-testing)
- [Static Site Generators](#static-site-generators)
- [Task Management & To-do Lists](#task-management--to-do-lists)
- [Ticketing](#ticketing)
- [URL Shorteners](#url-shorteners)
- [VPN](#vpn)
- [Web Servers](#web-servers)
- [Wikis](#wikis)
- [List of Licenses](#list-of-licenses)
- [External Links](#external-links)
- [Contributing](#contributing)
- [Authors](#authors)
- [License](#license)
## Software
### Analytics
**[`^ back to top ^`](#)**
**Please visit [Awesome Analytics](https://github.com/0xnr/awesome-analytics)**
_Related: [Personal Dashboards](#personal-dashboards)_
### Archiving and Digital Preservation (DP)
**[`^ back to top ^`](#)**
_Related: [Content Management Systems (CMS)](#content-management-systems-cms)_
- [Access to Memory (AtoM)](https://www.accesstomemory.org/) - Web-based, open source application for standards-based archival description and access in a multilingual, multi-repository environment. ([Demo](https://demo.accesstomemory.org/), [Source Code](https://github.com/artefactual/atom)) `AGPL-3.0-only` `PHP`
- [ArchiveBox](https://archivebox.io/) - Self-hosted _wayback machine_ that creates HTML & screenshot archives of sites from your bookmarks, browsing history, RSS feeds, or other sources. ([Source Code](https://github.com/ArchiveBox/ArchiveBox)) `MIT` `Python`
- [Archivematica](https://www.archivematica.org/) - Mature digital preservation system designed to maintain standards-based, long-term access to collections of digital objects. ([Demo](https://sandbox.archivematica.org/administration/accounts/login/), [Source Code](https://github.com/artefactual/archivematica)) `AGPL-3.0-only` `Python`
- [ArchivesSpace](https://archivesspace.org/) - Archives information management application for managing and providing Web access to archives, manuscripts and digital objects. ([Demo](https://archivesspace.org/application/demo/), [Source Code](https://github.com/archivesspace/archivesspace)) `ECL-2.0` `Ruby`
- [CKAN](https://ckan.org) - CKAN is a tool for making open data websites. ([Source Code](https://github.com/ckan/ckan)) `AGPL-3.0` `Python`
- [Collective Access - Providence](https://collectiveaccess.org/) - Highly configurable Web-based framework for management, description, and discovery of digital and physical collections supporting a variety of metadata standards, data types, and media formats. ([Source Code](https://github.com/collectiveaccess/providence)) `GPL-3.0-only` `PHP`
5 months ago
- [Horahora](https://github.com/horahoradev/horahora) - Video hosting website and video archival manager for Niconico, Bilibili, and Youtube. `MIT` `Go`
### Automation
**[`^ back to top ^`](#)**
_Related: [Internet of Things (IoT)](#internet-of-things-iot)_
- [Accelerated Text](https://github.com/tokenmill/accelerated-text) - Automatically generate multiple natural language descriptions of your data varying in wording and structure. `Apache-2.0` `Java`
- [Actionsflow](https://github.com/actionsflow/actionsflow) `⚠` - The free Zapier/IFTTT alternative for developers to automate your workflows based on Github actions. `MIT` `Docker/Nodejs`
- [ActiveWorkflow](https://github.com/automaticmode/active_workflow) - An intelligent process and workflow automation platform based on software agents. `MIT` `Ruby`
- [Alltube](https://www.alltubedownload.net) - Web interface for [youtube-dl](https://github.com/ytdl-org/youtube-dl), a program to download videos and audio from [more than 100 websites](https://ytdl-org.github.io/youtube-dl/supportedsites.html). ([Source Code](https://github.com/Rudloff/alltube)) `GPL-3.0` `PHP`
- [AmIUnique](https://amiunique.org/) - Learn how identifiable you are on the Internet (browser fingerprinting tool). ([Source Code](https://github.com/DIVERSIFY-project/amiunique)) `MIT` `Java`
- [Baserow](https://baserow.io/) - Open source online database tool and Airtable alternative. Create your own database without technical experience. ([Source Code](https://gitlab.com/bramw/baserow)) `MIT` `Python/Nodejs`
- [Beehive](https://github.com/muesli/beehive) - Flexible event and agent system, which allows you to create your own agents that perform automated tasks triggered by events and filters. `AGPL-3.0` `Go`
- [betanin](https://github.com/sentriz/betanin/) - Music organization man-in-the-middle of your torrent client and music player. Based on beets.io, similar to Sonarr and Radarr. `GPL-3.0` `Python`
- [ChiefOnboarding](https://chiefonboarding.com) - Employee onboarding platform that allows you to provision user accounts and create sequences with todo items, resources, text/email/Slack messages, and more! Available as a web portal and Slack bot. ([Source Code](https://github.com/chiefonboarding/ChiefOnboarding)) `AGPL-3.0` `Python`
- [CouchPotato](https://couchpota.to/) - CouchPotato is an automatic Video Library Manager for Movies. Automatic torrent/nzb searching, downloading, and processing at the qualities you want. ([Source Code](https://github.com/CouchPotato/CouchPotatoServer)) `GPL-3.0` `Python`
- [Episodes](https://github.com/guptachetan1997/Episodes) `⚠` - Self Hosted TV show Episode tracker and recommender built using django, bootstrap4. `MIT` `Python`
- [Exadel CompreFace](https://exadel.com/solutions/compreface/) - face recognition system that provides REST API for face recognition, face detection, and other face services, and is easily deployed with docker. There are SDKs for Python and JavaScript languages. Can be used without prior machine learning skills. ([Source Code](https://github.com/exadel-inc/CompreFace)) `Apache-2.0` `Docker/Java/Nodejs`
- [feed2toot](https://feed2toot.readthedocs.io/) - Feed2toot parses a RSS feed, extracts the last entries and sends them to Mastodon. ([Source Code](https://gitlab.com/chaica/feed2toot)) `GPL-3.0` `Python`
- [feedmixer](https://github.com/cristoper/feedmixer) - FeedMixer is a WSGI (Python3) micro web service which takes a list of feed URLs and returns a new feed consisting of the most recent n entries from each given feed(Returns Atom, RSS, or JSON). ([Demo](https://mretc.net/feedmixer/json?f=https://hnrss.org/newest&f=https://americancynic.net/atom.xml&n=1)) `WTFPL` `Python`
- [Headphones](https://github.com/rembo10/headphones) - Automated music downloader for NZB and Torrent, written in Python. It supports SABnzbd, NZBget, Transmission, µTorrent, Deluge and Blackhole. `GPL-3.0` `Python`
- [Healthchecks](https://healthchecks.io/) - Django app which listens for pings and sends alerts when pings are late. ([Source Code](https://github.com/healthchecks/healthchecks)) `BSD-3-Clause` `Python`
- [homebank-converter](https://github.com/Binnette/homebank-converter) - Web app to convert an export bank file to compatible Homebank csv. ([Demo](https://binnette.github.io/homebank-converter/)) `AGPL-3.0` `HTML5`
- [HRConvert2](https://github.com/zelon88/HRConvert2) - Drag-and-drop file conversion server with session based authentication, automatic temporary file maintenance, and logging capability. `GPL-3.0` `PHP`
- [Huginn](https://github.com/huginn/huginn) - Allows you to build agents that monitor and act on your behalf. `MIT` `Ruby`
- [Kibitzr](https://kibitzr.github.io) - Lightweight personal web assistant with powerful integrations. ([Source Code](https://github.com/kibitzr/kibitzr)) `MIT` `Python`
- [Krayin](https://krayincrm.com/) - Free and Opensource Laravel CRM Application. ([Source Code](https://github.com/krayin/laravel-crm)) `MIT` `PHP`
- [LazyLibrarian](https://gitlab.com/LazyLibrarian/LazyLibrarian) `⚠` - LazyLibrarian is a program to follow authors and grab metadata for all your digital reading needs. It uses a combination of Goodreads Librarything and optionally GoogleBooks as sources for author info and book info. `GPL-3.0` `Python`
- [Leon](https://getleon.ai) - Open-source personal assistant who can live on your server. ([Source Code](https://github.com/leon-ai/leon)) `MIT` `Nodejs`
3 years ago
- [Lidarr](https://lidarr.audio/) - Lidarr is a music collection manager for Usenet and BitTorrent users. ([Source Code](https://github.com/Lidarr/Lidarr)) `GPL-3.0` `C#`
- [Medusa](https://pymedusa.com/) - Automatic Video Library Manager for TV Shows. It watches for new episodes of your favorite shows, and when they are posted it does its magic. ([Source Code](https://github.com/pymedusa/Medusa)) `GPL-3.0` `Python`
- [MeTube](https://github.com/alexta69/metube) - Web GUI for youtube-dl, with playlist support. Allows downloading videos from dozens of websites. `AGPL-3.0` `Python/Nodejs/Docker`
- [n8n](https://n8n.io/) - Free node based Workflow Automation Tool. Easily automate tasks across different services. ([Source Code](https://github.com/n8n-io/n8n)) `Apache-2.0` `Nodejs`
- [nefarious](https://github.com/lardbit/nefarious) - Web application that automates downloading Movies and TV Shows. `GPL-3.0` `Python`
4 months ago
- [NocoDB](https://www.nocodb.com/) - No-code platform that turns any database into a smart spreadsheet. It can be considered as an Airtable or Smartsheet alternative. ([Source Code](https://github.com/nocodb/nocodb)) `GPL-3.0` `Nodejs`
- [OliveTin](https://github.com/OliveTin/OliveTin) - OliveTin is a web interface for running Linux shell commands. `AGPL-3.0` `Go`
- [Patrowl](https://github.com/Patrowl/PatrowlManager) - Open Source, Smart and Scalable Security Operations Orchestration Platform. `AGPL-3.0` `Python`
- [Podgrab](https://github.com/akhilrex/podgrab) - Lightweight podcast manager and automatic podcast episode downloader. It will monitor podcasts for your and download them automatically whenever a new episode goes live. `GPL-3.0` `Docker/Go`
- [pyLoad](https://pyload.net/) - Lightweight, customizable and remotely manageable downloader for 1-click-hosting sites like rapidshare.com or uploaded.to. ([Source Code](https://github.com/pyload/pyload)) `GPL-3.0` `Python`
- [Radarr](https://radarr.video/) - Radarr is an independent fork of Sonarr reworked for automatically downloading movies via Usenet and BitTorrent, à la Couchpotato. ([Source Code](https://github.com/Radarr/Radarr)) `GPL-3.0` `C#`
- [SickRage](https://www.sickrage.ca) - SickRage is an automatic Video Library Manager for TV Shows. Automatic torrent/nzb searching, downloading, and processing at the qualities you want. ([Source Code](https://github.com/SickRage/SickRage)) `GPL-3.0` `Python`
- [SiteInspector](https://www.getsiteinspector.com/) - Web-based tool for catching spelling errors, grammatical errors, broken links, and other errors on websites. ([Demo](https://demo.getsiteinspector.com/reports), [Source Code](https://github.com/siteinspector/siteinspector)) `AGPL-3.0` `Ruby`
- [Sonarr](https://sonarr.tv/) - Automatic TV Shows downloader and manager for Usenet and BitTorrent. It can grab, sort and rename new episodes and automatically upgrade the quality of files already downloaded when a better quality format becomes available. ([Source Code](https://github.com/Sonarr/Sonarr)) `GPL-3.0` `C#`
- [StackStorm](https://stackstorm.com) - StackStorm (aka _IFTTT for Ops_) is event-driven automation for auto-remediation, security responses, troubleshooting, deployments, and more. Includes rules engine, workflow, 160 integration packs with 6000+ actions and ChatOps. ([Source Code](https://github.com/StackStorm/st2)) `Apache-2.0` `Python`
- [WebUI-aria2](https://github.com/ziahamza/webui-aria2) - Interface to interact with the aria2 downloader. Very simple to use, just download and open index.html in any web browser. ([Demo](https://ziahamza.github.io/webui-aria2/)) `MIT` `HTML5`
- [ydl_api](https://github.com/Totonyus/ydl_api) - Simple youtube-dl REST API to launch downloads on a distant server. `Unlicense` `Python`
- [YoutubeDL-Material](https://github.com/Tzahi12345/YoutubeDL-Material) - Material Design inspired YouTube downloader, based on youtube-dl. Supports playlists, quality select, search, dark mode and much more, all with a clean and modern design. `MIT` `Nodejs`
- [Zenbot](https://github.com/DeviaVir/zenbot) - Zenbot is a lightweight, extendable, artificially intelligent trading bot for Bitcoin, Ether, Litecoin, and more. `MIT` `Nodejs`
- [ZeroQueue](https://github.com/thezeroqueue/zeroqueue) - A low-code queue management system that lets you run scheduled jobs for anything. `GPL-3.0` `Nodejs`
- [µTask](https://github.com/ovh/utask) - µTask is an automation engine that models and executes business processes declared in yaml. `BSD-3-Clause` `Go`
### Blogging Platforms
**[`^ back to top ^`](#)**
_Related: [Static Site Generators](#static-site-generators), [Content Management Systems (CMS)](#content-management-systems-cms)_
_See also: [WeblogMatrix](https://www.weblogmatrix.org/)_
- [Antville](https://antville.org) - Free, open source project aimed at the development of a high performance, feature rich weblog hosting software. ([Source Code](https://github.com/antville/antville)) `Apache-2.0` `Javascript`
- [Blog](https://github.com/m1k1o/blog) - Facebook-styled blog. Free, extremely lightweight, single-user and easy to install. ([Demo](https://blog.m1k1o.net/)) `GPL-3.0` `PHP`
- [Blogotext](https://github.com/BlogoText/blogotext) - Free blog-engine written in PHP and using SQLite. This offers you both an unmatched simplicity during installation and great performances. `MIT` `PHP`
- [Bludit](https://www.bludit.com/) `⚠` - Simple application to build a site or blog in seconds. Bludit uses flat-files (text files in JSON format) to store posts and pages. ([Demo](https://demo.bludit.com/), [Source Code](https://github.com/bludit/bludit)) `MIT` `PHP`
- [Cadmus](https://github.com/ldemafelix/cadmus) - Cadmus is an extremely lightweight, flat-file blogging platform powered by Markdown. `MIT` `PHP`
- [Canvas](https://trycanvas.app/) - A Laravel publishing platform. ([Source Code](https://github.com/austintoddj/canvas)) `MIT` `PHP`
- [Chyrp Lite](https://chyrplite.net) - Extra-awesome, extra-lightweight blog engine. ([Source Code](https://github.com/xenocrat/chyrp-lite)) `BSD-3-Clause` `PHP`
- [Dante Stories](https://dante-stories.herokuapp.com/) - Self hosted Medium platform built with Ruby on Rails. ([Source Code](https://github.com/michelson/dante-stories)) `MIT` `Ruby`
- [Dotclear](https://dotclear.org/) - Take control over your blog. ([Source Code](https://hg.dotclear.org/dotclear)) `GPL-2.0` `PHP`
- [Formtools](https://formtools.org/) - Powerful, flexible, free and open source PHP/MySQL script to manage your forms and data. ([Source Code](https://github.com/formtools)) `GPL-2.0` `PHP`
- [Ghost](https://ghost.org/) - Just a blogging platform. ([Source Code](https://github.com/TryGhost/Ghost)) `MIT` `Nodejs`
- [Haven](https://havenweb.org/) - Private blogging system with markdown editing and built in RSS reader. ([Demo](https://havenweb.org/demo.html), [Source Code](https://github.com/havenweb/haven)) `MIT` `Ruby`
- [Hotglue](https://hotglue.me/) - Freehand CMS which allows to construct websites directly in a web-browser. It uses flat files for storage and provides an intuitive GUI. ([Demo](https://hotglue.me/demo/), [Source Code](https://github.com/k0a1a/hotglue2)) `GPL-3.0` `PHP`
- [htmly](https://www.htmly.com/) - Databaseless Blogging Platform (Flat-File Blog). ([Demo](https://demo.htmly.com/), [Source Code](https://github.com/danpros/htmly)) `GPL-2.0` `PHP`
- [Known](https://withknown.com/) - A collaborative social publishing platform. ([Source Code](https://github.com/idno/known)) `Apache-2.0` `PHP`
- [Plume](https://joinplu.me/) - Federated blogging engine, based on ActivityPub. ([Source Code](https://github.com/Plume-org/Plume)) `AGPL-3.0` `Rust`
- [PluXml](https://pluxml.org) - XML-based blog/CMS platform. ([Source Code](https://github.com/pluxml/PluXml)) `GPL-1.0` `PHP`
- [Serendipity](https://docs.s9y.org/) - Serendipity (s9y) is a highly extensible and customizable PHP blog engine using Smarty templating. ([Source Code](https://github.com/s9y/serendipity)) `BSD-3-Clause` `PHP`
### Booking and Scheduling
**[`^ back to top ^`](#)**
_Related: [Polls and Events](#polls-and-events)_
- [Alf.io](https://alf.io/) - The open source ticket reservation system. ([Demo](https://demo.alf.io/authentication), [Source Code](https://github.com/alfio-event/alf.io)) `GPL-3.0` `Java`
- [Calendso](https://calendso.com/) - The open-source online appointment scheduling system. ([Demo](https://app.calendso.com/bailey), [Source Code](https://github.com/calendso/calendso)) `MIT` `Nodejs`
- [Easy!Appointments](https://easyappointments.org/) - A highly customizable web application that allows your customers to book appointments with you via the web. ([Demo](https://easyappointments.org/demo/), [Source Code](https://github.com/alextselegidis/easyappointments)) `GPL-3.0` `PHP`
### Bookmarks and Link Sharing
**[`^ back to top ^`](#)**
- [dyu bookmarks](https://github.com/dyu/bookmarks) - Single-threaded/process bookmark app powered by leveldb and uWebSockets. Supports importing from Delicious and Chrome. ([Demo](https://dyuproject.com/bookmarks/)) `Apache-2.0` `Java`
- [Espial](https://github.com/jonschoning/espial) - An open-source, web-based bookmarking server. `AGPL-3.0` `Haskell`
- [Firefox Account Server](https://mozilla-services.readthedocs.io/en/latest/howtos/run-fxa.html) - This allows you to host your own Firefox accounts server. ([Source Code](https://github.com/mozilla/fxa)) `MPL-2.0` `Nodejs, Java`
- [Firefox Sync Server](https://github.com/mozilla-services/syncserver) - Sync Firefox bookmarks, passwords, history, tabs, preferences. `MPL-2.0` `Python`
- [Geekmarks](https://geekmarks.dmitryfrank.com/) - Personal bookmarking service focused on speed and organization using hierarchical tags. ([Source Code](https://github.com/dimonomid/geekmarks)) `BSD-2-Clause` `Go`
- [golinks](https://git.mills.io/prologic/golinks) - Web application that allows you to create smart bookmarks, commands and aliases by pointing your web browser's default search engine at a running instance. Similar to bunny1 or yubnub. ([Demo](https://search.mills.io)) `MIT` `Go`
- [Hackershare](https://github.com/hackershare/hackershare) - Social bookmarks website for hackers. ([Demo](https://hackershare.dev)) `MIT` `Ruby`
11 months ago
- [LinkAce](https://www.linkace.org/) - A bookmark archive with automatic backups to the Internet Archive, link monitoring, and a full REST API. Installation is done via Docker, or as a simple PHP application. ([Demo](https://demo.linkace.org/), [Source Code](https://github.com/Kovah/LinkAce/)) `GPL-3.0` `PHP`
- [linkding](https://github.com/sissbruecker/linkding) - Minimal bookmark management with a fast and clean UI. Simple installation through Docker and can run on your Raspberry Pi. ([Demo](https://demo.linkding.link/)) `MIT` `Docker/Python/Nodejs`
- [Lobsters](https://lobste.rs) - Run your own link aggregation site. ([Source Code](https://github.com/jcs/lobsters)) `BSD-3-Clause` `Ruby`
- [No Fuss Bookmarks](https://nofussbm.herokuapp.com/signup.html) - Very simple software and service to store bookmarks especially designed for hackers (that don't need fancy interfaces, but nice API). ([Source Code](https://github.com/mapio/nofussbm)) `GPL-3.0` `Python`
- [Pinry](https://getpinry.com/) - The tiling image board system for people who want to save, tag, and share images, videos, and webpages. ([Source Code](https://github.com/pinry/pinry)) `BSD-2-Clause` `Python`
- [Reminiscence](https://github.com/kanishka-linux/reminiscence) - Self-Hosted Bookmark And Archive Manager. `AGPL-3.0` `Python`
- [Shaarli](https://github.com/shaarli/Shaarli) - Personal, minimalist, super-fast, no-database bookmarking and link sharing platform. ([Demo](https://demo.shaarli.org)) `Zlib` `PHP`
- [Shiori](https://github.com/go-shiori/shiori) - Simple bookmark manager built with Go. `MIT` `Go`
- [ubookmark](https://ungleich.ch/u/projects/ubookmark/) - LDAP enabled bookmarking service. ([Demo](https://ipv6.blog), [Source Code](https://code.ungleich.ch/ungleich-public/ubookmark/)) `GPL-2.0` `Python`
- [unmark](https://unmark.it/) - Open source to do app for links. ([Source Code](https://github.com/cdevroe/unmark)) `MIT` `PHP`
- [xBrowserSync](https://www.xbrowsersync.org) - Open source tool for syncing browser data between browsers and devices. ([Source Code](https://github.com/xBrowserSync)) `MIT` `Nodejs`
### Calendar & Contacts
**[`^ back to top ^`](#)**
_Related: [Groupware](#groupware)_
_See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https://en.wikipedia.org/wiki/Comparison_of_CalDAV_and_CardDAV_implementations)_
### Calendar & Contacts - CalDAV or CardDAV Servers
**[`^ back to top ^`](#)**
- [Baïkal](https://sabre.io/baikal/) - Lightweight CalDAV and CardDAV server based on sabre/dav. ([Source Code](https://github.com/sabre-io/Baikal)) `GPL-3.0` `PHP`
- [calypso](https://keithp.com/calypso/) - Python-based CalDAV and CardDAV server, forked from Radicale. ([Source Code](https://keithp.com/git/calypso.git)) `GPL-3.0` `Python`
- [DAViCal](https://www.davical.org/) - Server for calendar sharing (CalDAV) that uses a PostgreSQL database as a data store. ([Source Code](https://gitlab.com/davical-project/davical)) `GPL-2.0` `PHP`
- [Davis](https://github.com/tchapi/davis/) - A simple, dockerizable and fully translatable admin interface for sabre/dav based on Symfony 5 and Bootstrap 4, largely inspired by Baïkal. `MIT` `PHP`
3 years ago
- [DecSync CC](https://f-droid.org/packages/org.decsync.cc/) - Serverless contacts, calendar synchronization using your own file syncing method i.e Syncthing, Nextcloud etc. ([Source Code](https://github.com/39aldo39/DecSyncCC)) `GPL-3.0` `Kotlin`
- [Etebase (EteSync)](https://www.etebase.com/) - End-to-end encrypted and journaled personal information server supporting calendar and contact data, offering its own clients. ([Source Code](https://github.com/etesync/server)) `AGPL-3.0` `Python/Django`
- [Radicale](https://radicale.org/) - Simple calendar and contact server with extremely low administrative overhead. ([Source Code](https://github.com/Kozea/Radicale)) `GPL-3.0` `Python`
- [SabreDAV](https://sabre.io/) - Open source CardDAV, CalDAV, and WebDAV framework and server. ([Source Code](https://github.com/sabre-io/dav)) `MIT` `PHP`
- [Xandikos](https://www.xandikos.org/) - Open source CardDAV and CalDAV server with minimal administrative overhead, backed by a Git repository. ([Source Code](https://github.com/jelmer/xandikos)) `GPL-3.0` `Python`
### Calendar & Contacts - CalDAV or CardDAV Web-based Clients
**[`^ back to top ^`](#)**
- [AgenDAV](https://agendav.org/) - Multilanguage CalDAV web client with a rich AJAX interface and shared calendars support. ([Source Code](https://github.com/agendav/agendav)) `GPL-3.0` `PHP`
- [EteSync Web](https://www.etesync.com/faq/#web-client) - EteSync's official Web-based client (i.e., their Web app). ([Demo](https://client.etesync.com/), [Source Code](https://github.com/etesync/etesync-web)) `AGPL-3.0` `Javascript`
- [InfCloud](https://www.inf-it.com/open-source/clients/infcloud/) - Open source CalDAV/CardDAV web client implementation. ([Demo](https://www.inf-it.com/infcloud/), [Source Code](https://www.inf-it.com/InfCloud_0.13.1.zip)) `AGPL-3.0` `Javascript`
### Communication
**[`^ back to top ^`](#)**
### Communication - Custom Communication Systems
**[`^ back to top ^`](#)**
- [BluetoothCommunicatorExample](https://github.com/niedev/BluetoothCommunicatorExample) - Bluetooth LE chat app to communicate between android devices with P2P architecture. ([Clients](https://github.com/niedev/RTranslator)) `Apache-2.0` `Java`
- [Centrifugo](https://github.com/centrifugal/centrifugo) - Language-agnostic real-time messaging (Websocket or SockJS) server. ([Demo](https://github.com/centrifugal/centrifugo#demo)) `MIT` `Go`
- [Chaskiq](https://chaskiq.io) - Full featured livechat, helpcenter and CRM as an alternative to Intercom & Drift, Crisp and others. ([Source Code](https://github.com/chaskiq/chaskiq)) `AGPL-3.0` `Ruby`
- [Chatwoot](https://www.chatwoot.com) - Self-hosted customer communication platform, an alternative to Intercom & Zendesk. ([Source Code](https://github.com/chatwoot/chatwoot)) `MIT` `Ruby`
- [Cherry](https://github.com/rafael-santiago/cherry) - Tiny webchat server. `GPL-2.0` `Go`
- [Conduit](https://conduit.rs/) - A simple, fast, and reliable chat server powered by Matrix. ([Source Code](https://gitlab.com/famedly/conduit)) `Apache-2.0` `Rust`
- [Darkwire.io](https://github.com/darkwire/darkwire.io) - End-to-end encrypted instant web chat. `MIT` `Nodejs`
- [Element](https://element.io) - Fully-featured Matrix client for Web, iOS & Android. ([Source Code](https://github.com/vector-im/element-web)) `Apache-2.0` `Javascript`
- [Enigma Reloaded](https://github.com/enigma-reloaded/enigma-reloaded) - DIY Message and file encryption for any platform. `GPL-3.0` `Javascript`
- [Freenet](https://freenetproject.org/index.html) - Anonymously share files, browse and publish _freesites_ (web sites accessible only through Freenet) and chat on forums. ([Source Code](https://github.com/freenet/fred)) `GPL-2.0` `Java`
- [Galene](https://galene.org/) - Galène (or Galene) is a videoconference server (an “SFU”) that is easy to deploy and that requires moderate server resources. ([Source Code](https://github.com/jech/galene)) `MIT` `Go`
- [GNUnet](https://gnunet.org/) - Free software framework for decentralized, peer-to-peer networking. ([Source Code](https://gnunet.org/git/)) `GPL-3.0` `C`
3 years ago
- [Gotify](https://gotify.net/) - Self-hosted notification server with Android and CLI clients, similar to PushBullet. ([Source Code](https://github.com/gotify/server), [Clients](https://github.com/gotify/android)) `MIT` `Go`
- [Hawkpost](https://hawkpost.co) - HawkPost is a web app that lets you create unique links that you can share with a person that desires to send you important information but doesn't know how to encrypt it. The message is encrypted in their browser and sent to your email address. ([Source Code](https://github.com/whitesmith/hawkpost)) `MIT` `Python`
- [Jami](https://jami.net/) - Free and universal communication platform which preserves the user's privacy and freedoms (formerly GNU Ring). ([Source Code](https://git.ring.cx/savoirfairelinux/ring-project)) `GPL-3.0` `C++`
- [Jitsi Meet](https://jitsi.org/Projects/JitsiMeet) - Jitsi Meet is an OpenSource (MIT) WebRTC Javascript application that uses Jitsi Videobridge to provide high quality, scalable video conferences. ([Source Code](https://github.com/jitsi/jitsi-meet)) `MIT` `Javascript`
- [Jitsi Video Bridge](https://jitsi.org/Projects/JitsiVideobridge) - WebRTC compatible Selective Forwarding Unit (SFU) that allows for multiuser video communication. ([Source Code](https://github.com/jitsi/jitsi-videobridge)) `Apache-2.0` `Java`
- [KChat](https://github.com/php-kchat/kchat) - PHP Based Live Chat Application. `Apache-2.0` `PHP`
- [LeapChat](https://github.com/cryptag/leapchat) - Ephemeral, encrypted, in-browser chat rooms. `AGPL-3.0` `Javascript`
- [Lets-Chat](https://sdelements.github.io/lets-chat/) - Self hosted chat suite written in Node. ([Source Code](https://github.com/sdelements/lets-chat)) `MIT` `Nodejs`
- [LibreNews](https://librenews.io/) - Decentralized and secure breaking news notification system. ([Source Code](https://github.com/milesmcc/LibreNews-Server/)) `GPL-3.0` `Python`
- [Live Helper Chat](https://livehelperchat.com/) - Live Support chat for your website. ([Source Code](https://github.com/LiveHelperChat/livehelperchat)) `Apache-2.0` `PHP`
- [LiveKit](https://livekit.io/) - Modern, scalable WebRTC conferencing platform with client SDKs. ([Demo](https://livekit.io/playground), [Source Code](https://github.com/livekit/livekit-server)) `Apache-2.0` `Go`
- [Matrix Console Web](https://matrix.org/docs/projects/client/matrix-console-web) - Web client meant to be a showcase of Matrix capabilities, and reference implementation of the Matrix standard. ([Source Code](https://github.com/matrix-org/matrix-angular-sdk)) `Apache-2.0` `Javascript`
- [Mattermost](https://mattermost.org/) - Open-source, on-prem Slack-alternative. It can be integrated with Gitlab. ([Source Code](https://github.com/mattermost/mattermost-server)) `AGPL-3.0/Apache-2.0` `Go`
- [MiAOU](https://miaou.dystroy.org/login) - Multi-room persistent chat server. ([Source Code](https://github.com/Canop/miaou)) `MIT` `Nodejs`
- [Mibew](https://mibew.org) - Mibew Messenger is an open-source live support application written in PHP and MySQL. It enables one-on-one chat assistance in real-time directly from your website. ([Demo](https://mibew.org/demo2), [Source Code](https://github.com/Mibew/mibew)) `Apache-2.0` `PHP`
- [Mumble](https://wiki.mumble.info/wiki/Main_Page) - Low-latency, high quality voice/text chat software. ([Source Code](https://github.com/mumble-voip/mumble), [Clients](https://wiki.mumble.info/wiki/3rd_Party_Applications)) `BSD-3-Clause` `C++`
- [OTS](https://ots.fyi/) - One-Time-Secret sharing platform with a symmetric 256bit AES encryption in the browser. ([Source Code](https://github.com/Luzifer/ots)) `Apache-2.0` `Go`
- [Papercups](https://papercups.io/) - An open source live customer chat web app written in Elixir. ([Demo](https://app.papercups.io/demo), [Source Code](https://github.com/papercups-io/papercups)) `MIT` `Elixir`
- [PushBits](https://github.com/pushbits/server) - Self-hosted notification server for relaying push notifications via Matrix, similar to PushBullet and Gotify. `ISC` `Go`
- [pWS](https://github.com/soketi/pws) - pWS is a free, open-source Pusher drop-in alternative. `MIT` `Nodejs`
- [Rallly](https://rallly.co) - Rallly is a free collaborative scheduling service. ([Source Code](https://github.com/lukevella/Rallly)) `CC-BY-SA-4.0` `Nodejs`
- [RetroShare](https://retroshare.cc) - Secured and decentralized communication system. Offers decentralized chat, forums, messaging, file transfer. ([Source Code](https://github.com/RetroShare/RetroShare)) `GPL-2.0` `C++`
- [Revolt](https://revolt.chat/) - Revolt is a user-first chat platform built with modern web technologies. ([Source Code](https://github.com/revoltchat)) `AGPL-3.0` `Rust`
- [Rocket.Chat](https://rocket.chat/) - Teamchat solution similar to Gitter.im or Slack. ([Source Code](https://github.com/RocketChat/Rocket.Chat)) `MIT` `Nodejs`
- [Shhh](https://github.com/smallwat3r/shhh) - Keep secrets out of emails or chat logs, share them using secure links with passphrase and expiration dates. `MIT` `Python`
- [Spectrum 2](https://spectrum.im/) - Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks. ([Source Code](https://github.com/SpectrumIM/spectrum2)) `GPL-3.0` `C++`
- [Spreed](https://www.spreed.me/) - WebRTC audio/video calls, conferencing server, and web client. ([Source Code](https://github.com/strukturag/spreed-webrtc)) `AGPL-3.0` `Go`
- [StoneAge Messenger](https://cweb.gitlab.io/StoneAge.html) - A self-hosted Android messenger, S3-compatible storage is the only backend needed. ([Source Code](https://gitlab.com/cweb-repos/cweb-conversations), [Clients](https://f-droid.org/en/packages/com.cweb.messenger/)) `GPL-3.0` `Java`
- [Synapse](https://matrix.org/docs/projects/server/synapse) - Server for [Matrix](https://matrix.org/), an open standard for decentralized persistent communication. ([Source Code](https://github.com/matrix-org/synapse)) `Apache-2.0` `Python`
- [Syndie](https://syndie.de) - Syndie is a libre system for operating distributed forums. `CC0-1.0` `Java`
- [TextBelt](https://github.com/typpo/textbelt) `⚠` - Outgoing SMS API that uses carrier-specific gateways to deliver your text messages for free, and without ads. `MIT` `Javascript`
- [Tinode](https://github.com/tinode) - Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots. ([Demo](https://sandbox.tinode.co/), [Source Code](https://github.com/tinode/chat), [Clients](https://github.com/tinode/webapp)) `GPL-3.0` `Go`
- [Tox](https://tox.chat/) - Distributed, secure messenger with audio and video chat capabilities. ([Source Code](https://github.com/TokTok/c-toxcore)) `GPL-3.0` `C`
- [Tuber](https://blog.trailofbits.com/2015/12/15/self-hosted-video-chat-with-tuber/) - Peer-to-peer video chat that works. ([Source Code](https://github.com/trailofbits/tubertc)) `MIT` `Javascript`
- [WBO](https://github.com/lovasoa/whitebophir#wbo) - A web Whiteboard to collaborate in real-time on schemas, drawings, and notes. ([Demo](https://wbo.ophir.dev/)) `AGPL-3.0` `Nodejs/Docker`
- [ZeroNet](https://zeronet.io/) `⚠` - Open, free, and uncensorable websites, using Bitcoin cryptography and BitTorrent network. ([Source Code](https://github.com/HelloZeroNet/ZeroNet)) `GPL-2.0` `Python`
- [Zulip](https://zulip.org) - Zulip is a powerful, open source group chat application. ([Source Code](https://github.com/zulip/zulip)) `Apache-2.0/Other` `Python`
### Communication - Email
**[`^ back to top ^`](#)**
### Communication - Email - Complete Solutions
**[`^ back to top ^`](#)**
Simple deployment of a mail server, e.g. for inexperienced or impatient admins.
- [AnonAddy](https://anonaddy.com) - Open source email forwarding service for creating aliases. ([Source Code](https://github.com/anonaddy/anonaddy)) `MIT` `PHP`
- [DebOps](https://docs.debops.org/) - Your Debian-based data center in a box. A set of general-purpose Ansible roles that can be used to manage Debian or Ubuntu hosts. ([Source Code](https://github.com/debops/debops)) `GPL-3.0-only` `YAML/Ansible/Python`
- [docker-mailserver](https://docker-mailserver.github.io/docker-mailserver/edge/) - Fullstack but simple mail server (smtp, imap, antispam, antivirus, etc.). Only configuration files, no SQL database. Keep it simple and versioned. Easy to deploy and upgrade. ([Source Code](https://github.com/docker-mailserver/docker-mailserver)) `MIT` `Docker`
- [emailwiz](https://github.com/LukeSmithxyz/emailwiz) - Luke Smith's bash script to completely automate the setup of a Postfix/Dovecot/SpamAssassin/OpenDKIM server on debian. `GPL-3.0` `Bash`
- [Excision Mail](https://github.com/Excision-Mail/Excision-Mail) - Fullstack, security focused mailserver based on OpenSMTPD for OpenBSD using ansible. `ISC` `Shell/Ansible`
- [homebox](https://github.com/progmaticltd/homebox) - Suite of Ansible scripts to deploy a fully functional mail server on Debian. Unobtrusive and automatic as much as possible, focusing on stability and security. `GPL-3.0` `Shell`
- [Inboxen](https://inboxen.org) - Inboxen is a service that provides you with an infinite number of unique inboxes. ([Source Code](https://github.com/Inboxen/Inboxen)) `GPL-3.0` `Python`
- [iRedMail](https://www.iredmail.org/) - Full-featured mail server solution based on Postfix and Dovecot. ([Source Code](https://github.com/iredmail/iRedMail)) `GPL-3.0` `Shell`
- [Maddy Mail Server](https://github.com/foxcpp/maddy) - All-in-one mail server that implements SMTP (both MTA and MX) and IMAP. Replaces Postfix, Dovecot, OpenDKIM, OpenSPF, OpenDMARC with single daemon. `GPL-3.0` `Go`
- [Mail-in-a-Box](https://mailinabox.email/) - Turns any Ubuntu server into a fully functional mail server with one command. ([Source Code](https://github.com/mail-in-a-box/mailinabox)) `CC0-1.0` `Shell`
2 years ago
- [Mailcow](https://mailcow.email/) - Mail server suite based on Dovecot, Postfix and other open source software, that provides a modern Web UI for administration. ([Source Code](https://github.com/mailcow/mailcow-dockerized)) `GPL-2.0` `Docker/PHP`
- [Mailu](https://mailu.io/) - Mailu is a simple yet full-featured mail server as a set of Docker images. ([Source Code](https://github.com/Mailu/Mailu)) `MIT` `Docker/Python`
- [Modoboa](https://modoboa.org/en/) - Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface. ([Source Code](https://github.com/modoboa/modoboa)) `ISC` `Python`
- [Ptorx](https://github.com/xyfir/ptorx) - Email privacy. Anonymously send and receive with alias forwarding. `GPL-3.0` `Nodejs`
- [Simple NixOS Mailserver](https://gitlab.com/simple-nixos-mailserver/nixos-mailserver) - Complete mailserver solution leveraging the Nix Ecosystem. `GPL-3.0` `Nix`
- [SimpleLogin](https://simplelogin.io) - Open source email alias solution to protect your email address. Comes with browser extensions and mobile apps. ([Source Code](https://github.com/simple-login/app)) `MIT` `Docker/Python`
- [wildduck](https://wildduck.email/) - Scalable no-SPOF IMAP/POP3 mail server. ([Source Code](https://github.com/nodemailer/wildduck)) `EUPL-1.2` `Nodejs`
### Communication - Email - Mail Delivery Agents
**[`^ back to top ^`](#)**
MDAs - IMAP/POP3 software
- [Cyrus IMAP](https://www.cyrusimap.org/) - Email (IMAP/POP3), contacts and calendar server. ([Source Code](https://github.com/cyrusimap/cyrus-imapd )) `BSD-3-Clause-Attribution` `C`
- [Dovecot](https://www.dovecot.org/) - IMAP and POP3 server written primarily with security in mind. ([Source Code](https://github.com/dovecot/core)) `MIT/LGPL-2.1` `C`
- [MailForm](https://github.com/Feuerhamster/mailform) - Lightweight self-hosted open source alternative to Formspree and SendGrid. `Apache-2.0` `Nodejs`
- [Piler](https://www.mailpiler.org/wiki/start) - feature-rich open source email archiving solution. ([Source Code](https://bitbucket.org/jsuto/piler)) `GPL-3.0` `C`
### Communication - Email - Mail Transfer Agents
**[`^ back to top ^`](#)**
MTAs / SMTP servers
- [chasquid](https://blitiri.com.ar/p/chasquid/) - SMTP (email) server with a focus on simplicity, security, and ease of operation. ([Source Code](https://blitiri.com.ar/git/r/chasquid/)) `Apache-2.0` `Go`
- [Courier MTA](https://www.courier-mta.org/) - Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services. ([Source Code](https://www.courier-mta.org/repo.html)) `GPL-3.0` `C`
- [Exim](https://www.exim.org/) - Message transfer agent (MTA) developed at the University of Cambridge. ([Source Code](https://git.exim.org/exim.git)) `GPL-3.0` `C`
- [Haraka](https://haraka.github.io/) - High-performance, pluginable SMTP server written in Javascript. ([Source Code](https://github.com/haraka/Haraka)) `MIT` `Javascript`
- [MailCatcher](https://mailcatcher.me/) - Ruby gem that deploys a simply SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development. ([Source Code](https://github.com/sj26/mailcatcher)) `MIT` `Ruby`
- [Maildrop](https://gitlab.com/markbeeson/maildrop) - Disposable email SMTP server, also useful for development. `MIT` `Scala`
- [MailHog](https://github.com/mailhog/MailHog) - Small Golang executable which runs an SMTP MTA gateway that accepts all mail and displays in web interface. Useful for debugging or development. `MIT` `Go`
- [OpenSMTPD](https://opensmtpd.org/) - Secure SMTP server implementation from the OpenBSD project. ([Source Code](https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/smtpd/)) `ISC` `C`
- [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement. `IPL-1.0` `C`
- [Qmail](https://cr.yp.to/qmail.html) - Secure Sendmail replacement. ([Source Code](https://sources.debian.net/src/netqmail/1.06-5/)) `CC0-1.0` `C`
- [Sendmail](https://www.proofpoint.com/us/products/email-protection/open-source-email-solution) - Message transfer agent (MTA). `Sendmail` `C`
- [Slimta](https://www.slimta.org) - Mail Transfer Library built on Python. ([Source Code](https://github.com/slimta/python-slimta)) `MIT` `Python`
### Communication - Email - Mailing Lists and Newsletters
6 years ago
**[`^ back to top ^`](#)**
Mailing lists servers and mass mailing software - one message to many recipients.
6 years ago
- [Dada Mail](https://dadamailproject.com/) - Web-based list management system that can be used for announcement lists and/or discussion lists. ([Source Code](https://github.com/justingit/dada-mail)) `GPL-2.0` `Perl`
- [HyperKitty](https://wiki.list.org/HyperKitty) - Open source Django application to provide a web interface to access GNU Mailman v3 archives. ([Demo](https://lists.mailman3.org/), [Source Code](https://gitlab.com/mailman/hyperkitty)) `GPL-3.0` `Python`
- [Listmonk](https://listmonk.app/) - High performance, self-hosted newsletter and mailing list manager with a modern dashboard. ([Source Code](https://github.com/knadh/listmonk)) `AGPL-3.0` `Go`
- [Mailman](https://www.gnu.org/software/mailman/) - The Gnu mailing list server. `GPL-3.0` `Python`
- [Mailtrain](https://mailtrain.org/) - Self hosted newsletter application. ([Source Code](https://github.com/Mailtrain-org/mailtrain)) `GPL-3.0` `Nodejs`
- [MailyHerald](https://mailyherald.org/) - Self-hosted Mailchimp alternative that you can easily integrate with your site. Helps you send and manage your application mailings. It supports email marketing and conducting the daily stream of notifications you send to your users. ([Source Code](https://github.com/Sology/maily_herald)) `LGPL-3.0` `Ruby`
- [Mautic](https://www.mautic.org/) - Mautic is marketing automation software (email, social and more). ([Source Code](https://github.com/mautic/mautic)) `GPL-3.0` `PHP`
- [phpList](https://phplist.org) - Newsletter and email marketing with advanced management of subscribers, bounces, and plugins. ([Source Code](https://github.com/phpList/)) `AGPL-3.0` `PHP`
- [Postal](https://postal.atech.media/) - Fully featured open source mail delivery platform for incoming and outgoing e-mail. ([Source Code](https://github.com/postalhq/postal)) `MIT` `Ruby`
- [Postorius](https://docs.mailman3.org/projects/postorius/en/latest/) - Web user interface to access GNU Mailman. ([Source Code](https://gitlab.com/mailman/postorius/)) `GPL-3.0` `Python`
- [Schleuder](https://schleuder.nadir.org/) - GPG-enabled mailing list manager with resending-capabilities. ([Source Code](https://0xacab.org/schleuder/schleuder/tree/master)) `GPL-3.0` `Ruby`
- [Sympa](https://www.sympa.org/) - Mailing list manager. `GPL-2.0` `Perl`
### Communication - Email - Webmail Clients
**[`^ back to top ^`](#)**
- [Afterlogic WebMail Lite](https://afterlogic.org/webmail-lite) - Fast and easy-to-use webmail front-end for your existing IMAP mail server, Plesk or cPanel. ([Demo](https://lite.afterlogic.com/), [Source Code](https://github.com/afterlogic/webmail-lite)) `AGPL-3.0` `PHP`
- [Cypht](https://cypht.org) - Feed reader for your email accounts. ([Source Code](https://github.com/jasonmunro/cypht)) `LGPL-2.1` `PHP`
- [IMP](https://www.horde.org/apps/imp/) - HORDE application that provides webmail access to IMAP and POP3 accounts. ([Demo](http://demo.horde.org/), [Source Code](https://www.horde.org/download/imp)) `GPL-2.0` `PHP`
- [Isotope Mail](https://blog.marcnuri.com/isotope-mail-client-introduction/) - Microservice based webmail client built with ReactJS and Spring. ([Source Code](https://github.com/manusa/isotope-mail)) `Apache-2.0` `Docker/Java`
- [MailCare](https://mailcare.io) - Open source disposable email address service. ([Source Code](https://github.com/mailcare/mailcare)) `MIT` `PHP`
- [Mailpile](https://www.mailpile.is/) - Webmail client with search, filtering, encryption features and more. ([Source Code](https://github.com/mailpile/Mailpile)) `AGPL-3.0` `Python`
- [RainLoop](https://www.rainloop.net/) - Simple, modern and fast webmail with IMAP/SMTP Support and multi accounting. ([Demo](https://mail.rainloop.net), [Source Code](https://github.com/RainLoop/rainloop-webmail)). `AGPL-3.0` `PHP`
- [Roundcube](https://roundcube.net) - Browser-based IMAP client with an application-like user interface. ([Source Code](https://github.com/roundcube/roundcubemail)) `GPL-3.0` `PHP`
- [SquirrelMail](https://squirrelmail.org) - Another browser-based IMAP client. ([Source Code](https://sourceforge.net/p/squirrelmail/code/HEAD/tree/)) `GPL-2.0` `PHP`
### Communication - IRC
**[`^ back to top ^`](#)**
[IRC](https://en.wikipedia.org/wiki/Internet_Relay_Chat) communication software
- [Convos](https://convos.chat/) - Always online web IRC client. ([Demo](https://convos.chat/#instant-demo), [Source Code](https://github.com/nordaaker/convos)) `Artistic-2.0` `Perl`
- [Dispatch](https://github.com/khlieng/dispatch) - Self-hosted web IRC client written in Go. ([Demo](https://dispatch.khlieng.com/connect)) `MIT` `Go`
- [Ergo](https://ergo.chat/) - Modern IRCv3 server written in Go, combining the features of an ircd, a services framework, and a bouncer. ([Source Code](https://github.com/ergochat/ergo)) `MIT` `Go`
- [Glowing Bear](https://github.com/glowing-bear/glowing-bear/) - A web frontend for WeeChat. ([Demo](https://www.glowing-bear.org)) `GPL-3.0` `Javascript`
- [InspIRCd](https://www.inspircd.org/) - Modular IRC server written in C++ for Linux, BSD, Windows, and macOS. ([Source Code](https://github.com/inspircd/inspircd)) `GFDL-1.2-only` `C++`
- [Kiwi IRC](https://kiwiirc.com/) - Responsive web IRC client with theming support. ([Demo](https://kiwiirc.com/nextclient/), [Source Code](https://github.com/kiwiirc/kiwiirc)) `Apache-2.0` `Nodejs`
2 years ago
- [ngircd](https://ngircd.barton.de/) - Free, portable and lightweight Internet Relay Chat server for small or private networks. ([Source Code](https://github.com/ngircd/ngircd)) `GPL-2.0` `C`
- [Quassel IRC](https://quassel-irc.org/) - distributed IRC client, meaning that one (or multiple) client(s) can attach to and detach from a central core. ([Source Code](https://github.com/quassel/quassel)) `GPL-2.0` `C++`
- [Robust IRC](https://robustirc.net/) - RobustIRC is IRC without netsplits. Distributed IRC server, based on RobustSession protocol. ([Source Code](https://github.com/robustirc/robustirc)) `BSD-3-Clause` `Go`
- [The Lounge](https://thelounge.chat/) - Self-hosted web IRC client. ([Demo](https://demo.thelounge.chat/), [Source Code](https://github.com/thelounge/thelounge)) `MIT` `Nodejs`
2 years ago
- [Tiny Tiny IRC](https://tt-rss.org/tt-irc/) - An open source AJAX-powered chat platform with support for IRC ([Source Code](https://git.tt-rss.org/fox/tt-irc)). `GPL-3.0` `PHP/Java`
- [UnrealIRCd](https://www.unrealircd.org/) - Modular, advanced and highly configurable IRC server written in C for Linux, BSD, Windows, and macOS. ([Source Code](https://github.com/unrealircd/unrealircd)) `GPL-2.0` `C`
- [Weechat](https://weechat.org/) - Fast, light and extensible chat client. `GPL-3.0` `C`
- [ZNC](https://wiki.znc.in/ZNC) - Advanced IRC bouncer. ([Source Code](https://github.com/znc/znc)) `Apache-2.0` `C++`
### Communication - SIP
**[`^ back to top ^`](#)**
[SIP](https://en.wikipedia.org/wiki/Session_Initiation_Protocol)/[IPBX](https://en.wikipedia.org/wiki/IP_PBX) telephony software
- [Asterisk](https://www.asterisk.org/) - Easy to use but advanced IP PBX system, VoIP gateway and conference server. `GPL-2.0` `C`
- [ASTPP](https://www.astppbilling.org/) - is an Open Source VoIP Billing Solution for Freeswitch. It supports prepaid and postpaid billing with call rating and credit control. It also provides many other features. ([Source Code](https://github.com/iNextrix/ASTPP)) `AGPL-3.0` `PHP`
- [Freepbx](https://www.freepbx.org) - Web-based open source GUI that controls and manages Asterisk. ([Source Code](https://git.freepbx.org/projects/FREEPBX)) `GPL-2.0` `PHP`
- [FreeSWITCH](https://freeswitch.org/) - Scalable open source cross-platform telephony platform. ([Source Code](https://freeswitch.org/stash/projects/FS/repos/freeswitch/browse)) `MPL-2.0` `C`
- [FusionPBX](https://www.fusionpbx.com/) - Open source project that provides a customizable and flexible web interface to the very powerful and highly scalable multi-platform voice switch called FreeSWITCH. ([Source Code](https://github.com/fusionpbx/fusionpbx)) `MPL-1.1` `PHP`
- [Kamailio](https://www.kamailio.org/w/) - Modular SIP server (registrar/proxy/router/etc). ([Source Code](https://github.com/kamailio/kamailio)) `GPL-2.0` `C`
- [Kazoo](https://2600hz.org/) - KAZOO is an open-source, highly scalable software platform designed to provide carrier-grade VoIP switch functions and features. ([Source Code](https://github.com/2600hz/KAZOO)) `MPL-1.1` `Erlang`
- [Ostel](https://dev.guardianproject.info/projects/ostel/wiki/Server_Documentation) - Secure SIP telephony setup with ZRTP encryption. `GPL-3.0` `Ruby`
- [Routr](https://routr.io) - A lightweight sip proxy, location server, and registrar for a reliable and scalable SIP infrastructure. ([Source Code](https://github.com/fonoster/routr)) `MIT` `Javascript`
- [SIP3](https://sip3.io/) - VoIP troubleshooting and monitoring platform. ([Demo](https://demo.sip3.io), [Source Code](https://github.com/sip3io/)) `Apache-2.0` `Kotlin`
- [SIPCAPTURE Homer](https://www.sipcapture.org/) - Troubleshooting and monitoring VoIP calls. ([Source Code](https://github.com/sipcapture/homer)) `AGPL-3.0` `Angular/C`
- [SipXcom](https://sipxcom.org/) - Open source unified communications system. ([Source Code](https://github.com/sipXcom/sipxecs)) `AGPL-3.0` `Java`
- [Wazo](https://wazo-platform.org/) - Full-featured IPBX solution built atop Asterisk with integrated Web administration interface and REST-ful API. ([Source Code](https://github.com/wazo-platform)) `GPL-3.0` `Python`
- [Yeti-Switch](https://yeti-switch.org/) - Transit class4 softswitch(SBC) with integrated billing and routing engine and REST API. ([Demo](https://yeti-switch.org/demo.html), [Source Code](https://github.com/yeti-switch)) `GPL-2.0` `C++/Ruby`
### Communication - Social Networks and Forums
**[`^ back to top ^`](#)**
- [Abilian SBE](https://github.com/abilian/abilian-sbe) - Open Source Collaboration and Social Networking framework and platform. `LGPL-2.1` `Python`
- [Anahita](https://www.getanahita.com/) - Open Source Social Networking Framework and Platform. ([Source Code](https://github.com/anahitasocial)) `GPL-3.0` `PHP`
- [AsmBB](https://board.asm32.info) - A fast, SQLite-powered forum engine written in ASM. ([Source Code](https://asm32.info/fossil/asmbb/index)) `EUPL-1.2` `Assembly`
4 years ago
- [bbPress](https://bbpress.org/) - bbPress is forum software with a twist from the creators of WordPress. Easily setup discussion forums inside your WordPress.org powered site. ([Source Code](https://bbpress.trac.wordpress.org/browser/trunk)) `GPL-2.0` `PHP`
- [Bibliogram](https://bibliogram.art) `⚠` - An alternative front-end for Instagram. ([Source Code](https://sr.ht/~cadence/bibliogram/)) `AGPL-3.0` `Nodejs`
- [Bootcamp](https://trybootcamp.vitorfs.com) - Enterprise social network. ([Source Code](https://github.com/vitorfs/bootcamp)) `MIT` `Python`
- [Buddycloud](http://buddycloud.com/) - Tools, libraries, services and a community to build user-to-user, group and social messaging into your app. Saves time. Scales up. Supports you. ([Source Code](https://github.com/buddycloud)) `Apache-2.0` `Java`
- [BuddyPress](https://buddypress.org/about/) - Powerful plugin that takes your WordPress.org powered site beyond the blog with social-network features like user profiles, activity streams, user groups, and more. ([Source Code](https://github.com/buddypress/BuddyPress)) `GPL-2.0` `PHP`
- [Cactus Comments](https://cactus.chat/) - Cactus Comments is a federated comment system for the open web built on Matrix. ([Demo](https://cactus.chat/demo/), [Source Code](https://gitlab.com/cactus-comments/)) `GPL-3.0` `Python`
- [cartulary](https://github.com/daveajones/cartulary) - RSS reader, readability tool, article archiver, microblogger, social graph manager and reading list manager. `CDDL-1.0` `PHP`
- [Commento](https://gitlab.com/commento/commento) - Commento is a discussion platform that you can embed on your blog, news articles, and any place where you want your readers to add comments. `MIT` `Go`
- [Coral](https://coralproject.net/) - A better commenting experience from Vox Media. ([Source Code](https://github.com/coralproject/talk)) `Apache-2.0` `Nodejs`
- [diaspora*](https://diasporafoundation.org/) - Distributed social networking server. ([Demo](https://podupti.me/go.php), [Source Code](https://github.com/diaspora/diaspora)) `AGPL-3.0` `Ruby`
- [Discourse](https://www.discourse.org/) - Advanced forum / community solution based on Ruby and JS. ([Demo](https://try.discourse.org/), [Source Code](https://github.com/discourse/discourse)) `GPL-2.0` `Ruby`
- [dyu comments](https://github.com/dyu/comments) - Real-time, markdown-enabled comment engine powered by leveldb. ([Demo](https://dyu.github.io/comments/real-time/)) `Apache-2.0` `Java`
- [Elgg](https://elgg.org/) - Powerful open source social networking engine. ([Source Code](https://github.com/Elgg/Elgg)) `GPL-2.0` `PHP`
- [EpochTalk](https://github.com/epochtalk/epochtalk) - Next Generation Forum Software. `MIT` `Nodejs`
- [Flarum](https://flarum.org) - Delightfully simple forums. Flarum is the next-generation forum software that makes online discussion fun again. ([Source Code](https://github.com/flarum/flarum)) `MIT` `PHP`
- [FlaskBB](https://flaskbb.org/) - FlaskBB is forum software written in Python using the microframework Flask. You can easily create new topics, posts and send other users private messages. It also includes basic administration and moderation tools. ([Source Code](https://github.com/flaskbb/flaskbb)) `BSD-3-Clause` `Python`
- [FluxBB](https://fluxbb.org/) - Fast, light, user-friendly forum software for your website. ([Source Code](https://github.com/fluxbb/fluxbb)) `GPL-2.0` `PHP`
- [Friendica](https://friendi.ca/) - Social Communication Server. ([Source Code](https://github.com/friendica/friendica)) `AGPL-3.0` `PHP`
- [Glosa](https://github.com/glosa/glosa-server) - Open source commentary