- [Cyrus IMAP/POP3](http://cyrusimap.org/) - Intended to be run on sealed servers, where normal users are not permitted to log in. ([Source Code](https://github.com/cyrusimap/cyrus-imapd )) `BSD-3-Clause-Attribution``C`
- [Cyrus IMAP/POP3](https://www.cyrusimap.org/) - Intended to be run on sealed servers, where normal users are not permitted to log in. ([Source Code](https://github.com/cyrusimap/cyrus-imapd )) `BSD-3-Clause-Attribution``C`
- [Dovecot](http://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`
- [Kamailio](http://www.kamailio.org/w/) - Modular SIP server (registrar/proxy/router/etc). ([Source Code](https://github.com/kamailio/kamailio)) `GPL-2.0``C`
- [Kazoo](http://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`
- [Routr](https://routr.io) - A lightweight sip proxy, location server, and registrar for a reliable and scalable SIP infrastructure. ([Demo](https://demo.routr.io/login), [Source Code](https://github.com/fonoster/routr)) `MIT``JavaScript`
- [Tapir](http://www.sip3.io/) - Troubleshooting and real-time monitoring of VoIP-based systems. ([Source Code](https://github.com/sip3io/)) `Apache-2.0``Java/Kotlin`
- [Wazo](http://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`
@ -973,6 +974,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
- [Polaris](https://github.com/agersant/polaris) - Music browsing and streaming application optimized for large music collections, ease of use and high performance. `MIT``Rust`
- [Sonerezh](https://www.sonerezh.bzh/) - Self-hosted, web-based application for stream your music, everywhere. ([Demo](https://www.sonerezh.bzh/demo/), [Source Code](https://github.com/sonerezh/sonerezh)) `GPL-3.0``PHP`
- [Stretto](https://github.com/benkaiser/stretto) - Music player with Youtube/Soundcloud import and iTunes/Spotify discovery. ([Demo](https://next.kaiserapps.com), [Clients](https://github.com/benkaiser/stretto-mobile-next)) `MIT``Nodejs`
- [Volumio](https://volumio.org/) - A free and open source linux distribution, designed and fine-tuned exclusively for music playback. ([Source Code](https://github.com/volumio/Volumio2)) `GPL-3.0``NodeJS`
### Video Streaming
@ -1390,6 +1392,7 @@ See also [Static site generators](#static-site-generators)
- [Weblate](https://weblate.org) - Web-based translation tool with tight version control integration. ([Demo](https://demo.weblate.org), [Source Code](https://github.com/WeblateOrg/weblate)) `GPL-3.0``Python`
- [Zanata](http://zanata.org) - Web-based translation platform for translators, content creators and developers to manage localisation projects. ([Source Code](https://github.com/zanata/zanata-platform)) `GPL-2.0``Java`
@ -1405,7 +1408,7 @@ See https://staticsitegenerators.net and https://www.staticgen.com
*See also [Project Management](#project-management) and [Ticketing](#ticketing).*
- [Crepido](https://github.com/arshad/crepido) - Create (kanban) boards to track users and projects from flat markdown files. `MIT``Nodejs`
- [Kanbana](https://github.com/SrGMC/kanbana) - Create boards to track users and projects from flat markdown files. Forked from Crepido`MIT``Nodejs`
- [Kanboard](http://kanboard.net/) - Simple and open source visual task board. ([Source Code](https://github.com/kanboard/kanboard)) `MIT``PHP`
- [myTinyTodo](http://www.mytinytodo.net/) - Simple way to manage your todo list in AJAX style. Uses PHP, jQuery, SQLite/MySQL. GTD compliant. ([Demo](http://www.mytinytodo.net/demo/), [Source Code](https://bitbucket.org/maxpozdeev/mytinytodo)) `GPL-2.0``PHP`
- [Nullboard](https://github.com/apankrat/nullboard) - Single-page minimalist kanban board; compact, highly readable and quick to use. ([Demo](https://nullboard.io/preview)) `BSD-2-Clause``Javascript`