- [Synapse](http://matrix.org/docs/projects/server/synapse.html) - 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`
- [Matrix Console Web](http://matrix.org/docs/projects/client/matrix-console.html) - 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`
- [Syndie](https://www.syndie.de) - Syndie is a libre system for operating distributed forums. `CC0-1.0``Java`
- [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`
- [Tox](https://tox.chat/) - Distributed, secure messenger with audio and video chat capabilities. ([Source Code](https://github.com/irungentoo/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`
@ -333,7 +333,7 @@ _MTAs / SMTP servers_
- [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](http://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`
- [Symphony](https://hacpai.com/) - Modern community (forum/SNS/blog) platform written in Java. ([Source Code](https://github.com/b3log/symphony)) `GPL-3.0``Java`
- [Talkyard](https://www.talkyard.io/) - Create a community, where your users can suggest ideas and get questions answered. And have friendly open-ended discussions and chat (Slack/StackOverflow/Discourse/Reddit/Disqus hybrid). ([Demo](https://www.talkyard.io/forum/latest), [Source Code](https://github.com/debiki/talkyard)) `AGPL-3.0``Scala`
- [Telescope](http://www.telescopeapp.org/) - Open-source social news app built with Meteor. ([Demo](http://demo.telescopeapp.org/), [Source Code](https://github.com/TelescopeJS/Telescope)) `MIT``Nodejs`
- [twister](http://twister.net.co/) - Fully decentralized P2P microblogging platform leveraging the free software implementations of Bitcoin and BitTorrent protocols. ([Source Code](https://github.com/miguelfreitas/twister-core)) `MIT``C++`
- [Vanilla Forums](https://vanillaforums.org/) - Simple and flexible forum software. ([Source Code](https://github.com/vanilla/vanilla)) `GPL-2.0``PHP`
@ -537,7 +537,6 @@ CMS are a practical way to setup a website with many features. CMS often come wi
- [Redaxscript](https://redaxscript.com) - Ultra lightweight CMS for MySQL, SQLite and PostgreSQL. ([Demo](https://demo.redaxscript.com/login), [Source Code](https://github.com/redaxmedia/redaxscript)) `GPL-3.0``PHP`
- [Roadiz](https://www.roadiz.io/) - Modern CMS based on a node system which can handle many types of services. ([Source Code](https://github.com/roadiz/roadiz)) `MIT``PHP`
- [SilverStripe](https://www.silverstripe.org) - Easy to use CMS with powerful MVC framework underlying. ([Demo](http://demo.silverstripe.org/), [Source Code](https://github.com/silverstripe)) `BSD-3-Clause``PHP`
- [SPIP](http://www.spip.net/fr) - Publication system for the Internet aimed at collaborative work, multilingual environments, and simplicity of use for web authors. ([Source Code](https://core.spip.net/projects/spip/repository)) `GPL-2.0``PHP`
- [Squidex](http://squidex.io) - Headless CMS, based on MongoDB, CQRS and Event Sourcing. ([Demo](http://cloud.squidex.io), [Source Code](https://github.com/Squidex/squidex)) `MIT``.NET`
- [Strapi](https://strapi.io/) - The most advanced open-source Content Management Framework (headless-CMS) to build powerful API with no effort. ([Source Code](https://github.com/strapi/strapi)) `MIT``Nodejs`
@ -648,7 +647,7 @@ See https://github.com/n1trux/awesome-sysadmin#identity-management
- [Sismics Reader](http://sismics.com/reader/) - Free and open source feeds reader, including all major Google Reader features. ([Demo](https://www.sismics.com/reader/#!/demo), [Source Code](https://github.com/sismics/reader)) `GPL-2.0``Java`
- [Temboz](https://github.com/fazalmajid/temboz) - Two-column feed reader emphasizing filtering capabilities to manage information overload. `MIT``Python`
- [Tiny Tiny RSS](https://tt-rss.org/gitlab/fox/tt-rss) - Open source web-based news feed (RSS/Atom) reader and aggregator. ([Demo](http://framanews.org/)) `GPL-3.0``PHP`
- [Tiny Tiny RSS](https://tt-rss.org) - Open source web-based news feed (RSS/Atom) reader and aggregator. ([Demo](http://framanews.org/), [Source Code](https://git.tt-rss.org/fox/tt-rss)) `GPL-3.0``PHP`
- [gritttt-rss](http://gritttt-rss.nicolashoening.de/) - More features for Tiny Tiny RSS. ([Source Code](https://github.com/nhoening/gritttt-rss)) `BSD-2-Clause``Python`
- [ttrss-mobile](https://github.com/mboinet/ttrss-mobile) - Mobile webapp for Tiny Tiny RSS. `AGPL-3.0``Javascript`
- [ttrss-reader](https://github.com/kucrut/ttrss-reader) - Light and responsive client for TTRSS. `GPL-2.0``Javascript`
@ -766,7 +765,7 @@ _Games, game servers and control panels._
- [Clumsy Bird](https://github.com/ellisonleao/clumsy-bird) - MelonJS port of the famous Flappy Bird Game. ([Demo](http://ellisonleao.github.io/clumsy-bird/)) `MIT``Nodejs`
- [elevatorsaga](http://play.elevatorsaga.com/) - The elevator programming game. ([Source Code](https://github.com/magwo/elevatorsaga)) `MIT``Javascript`
- [Hextris](https://github.com/Hextris/hextris) - Fast paced HTML5 puzzle game inspired by Tetris. ([Demo](http://hextris.io/)) `GPL-3.0``HTML5`
- [Hextris](https://github.com/Hextris/hextris) - Fast paced HTML5 puzzle game inspired by Tetris. ([Demo](https://hextris.github.io/hextris)) `GPL-3.0``HTML5`
- [Lila](https://lichess.org/) - The forever free, adless and open source chess server powering lichess.org, with official iOS and Android client apps. ([Source Code](https://github.com/ornicar/lila)) `AGPL-3.0``Scala`
- [RconCli](https://github.com/gorcon/rcon-cli) - CLI for executing queries on a remote Valve Source dedicated server using the RCON Protocol. `MIT``Go`