- [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`
@ -345,7 +345,7 @@ _Mailing lists servers and mass mailing software - one message to many recipient
- [Mail For Good](https://github.com/freeCodeCamp/mail-for-good) `⚠` - Open source email campaign management tool for nonprofits. `BSD-3-Clause``Javascript`
- [Mailman](https://www.gnu.org/software/mailman/) - The Gnu mailing list server. `GPL-3.0``Python`
- [Mailtrain](https://mailtrain.org/) - self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB). ([Source Code](https://github.com/andris9/mailtrain)) `GPL-3.0``Nodejs`
- [MailyHerald](http://mailyherald.org/) - Self-hosted Mailchimp alternative that you can easily integrate with your site. Helps you send and manage your application mailings. It support 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`
- [MailyHerald](http://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://github.com/atech/postal) - Fully featured open source mail delivery platform for incoming and outgoing e-mail. `MIT``Ruby`
- [Thredded](https://github.com/thredded/thredded) - Forums, feature-rich and simple. `MIT``Ruby`
- [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++`
- [twtxt.net](https://twtxt.net) - a Self-Hosted, Twitter™-like Decentralised micro-logging platform. No ads, no tracking, your content, your data. ([Source Code](https://github.com/prologic/twtxt)) `MIT``Go`
- [rss2twtxt](https://github.com/prologic/rss2twtxt) - An RSS/Atom feed aggregator command-line tool and web service that consume RSS/Atom and produces twtxt.net feeds for consumption by twtxt clients. ([Demo](https://feeds.twtxt.net)) `MIT``Go`
- [rss2twtxt](https://github.com/prologic/rss2twtxt) - An RSS/Atom feed aggregator command-line tool and web service that consumes RSS/Atom and produces twtxt.net feeds for consumption by twtxt clients. ([Demo](https://feeds.twtxt.net)) `MIT``Go`
- [Vanilla Forums](https://vanillaforums.org/) - Simple and flexible forum software. ([Source Code](https://github.com/vanilla/vanilla)) `GPL-2.0``PHP`
- [Zusam](https://zusam.org) - Free and open-source way to self-host private forums for groups of friends or family. ([Demo](https://demo.zusam.org), [Source Code](https://github.com/zusam/zusam)) `AGPL-3.0``PHP`
@ -555,7 +555,7 @@ CMS are a practical way to setup a website with many features. CMS often come wi
_Recipe management_
- [OpenEats](https://github.com/open-eats/OpenEats) - Recipe management site that allows users to create, store, share and rate recipes, create grocery lists, and more. ([Demo](https://open-eats.github.io/)) `MIT``Python`
- [Recipes](https://github.com/vabene1111/recipes) - Recipes is a Django application to manage, tag and search recipes using either builtin models or external storage providers hosting PDF's, Images or other files. `MIT``Python`
- [Recipes](https://github.com/vabene1111/recipes) - Recipes is a Django application to manage, tag and search recipes using either built-in models or external storage providers hosting PDF's, Images or other files. `MIT``Python`
- [Evergreen](https://evergreen-ils.org) - Highly-scalable software for libraries that helps library patrons find library materials, and helps libraries manage, catalog, and circulate those materials. ([Source Code](https://github.com/evergreen-library-system/Evergreen)) `GPL-2.0``PL/pgSQL`
- [Koha](https://koha-community.org/) - Enterprise-class ILS with modules for acquisitions, circulation, cataloging, label printing, offline circulation for when Internet access is not available, and much more. ([Demo](https://koha-community.org/demo/), [Source Code](https://github.com/Koha-Community/Koha)) `GPL-3.0``Perl`
- [RERO ILS](https://rero21.ch/) - Large-scale ILS that can be run as a service with consortial features, intended primarily for library networks. Includes most standard modules (circulation, acquisitions, cataloging,...) and a web-based public and professionnal interface. ([Demo](https://ils.test.rero.ch/), [Source Code](https://github.com/rero/rero-ils)) `AGPL-3.0``Python/Other`
- [RERO ILS](https://rero21.ch/) - Large-scale ILS that can be run as a service with consortial features, intended primarily for library networks. Includes most standard modules (circulation, acquisitions, cataloging,...) and a web-based public and professional interface. ([Demo](https://ils.test.rero.ch/), [Source Code](https://github.com/rero/rero-ils)) `AGPL-3.0``Python/Other`
_Institutional repository and digital library software._