Update README.md

Add Isotope Mail client #2177
Add HyperKitty and Postorius #2145
Add LBRY #2111

README.md

@@ -346,8 +346,10 @@ _Mailing lists servers and mass mailing software - one message to many recipient
 - [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`
 - [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`
+- [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`
 - [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`
+- [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`
 
@@ -356,6 +358,7 @@ _Mailing lists servers and mass mailing software - one message to many recipient
 - [Afterlogic WebMail Lite](http://www.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](http://cypht.org/index.html) - Feed reader for your email accounts. ([Source Code](https://github.com/jasonmunro/hm3)) `GPL-2.0` `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` `JavaScript`
 - [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](http://www.rainloop.net/) - Simple, modern and fast webmail with IMAP/SMTP Support and multi accounting. ([Demo](http://demo.rainloop.net/), [Source Code](https://github.com/RainLoop/rainloop-webmail)). `AGPL-3.0` `PHP`
@@ -932,6 +935,7 @@ See also <https://en.wikipedia.org/wiki/List_of_streaming_media_systems>, <https
 - [Icecast 2](http://www.icecast.org/) - streaming audio/video server which can be used to create an Internet radio station or a privately running jukebox and many things in between. ([Source Code](https://gitlab.xiph.org/xiph/icecast-server), [Clients](http://www.icecast.org/apps/)) `GPL-2.0` `C`
 - [Jellyfin](https://jellyfin.org) - Media server for audio, video, books, comics, and photos with a sleek interface and robust transcoding capabilities. Almost all modern platforms have clients, including Roku, Android TV, iOS, Xbox, and Kodi. ([Demo](https://demo.jellyfin.org/stable), [Source Code](https://github.com/jellyfin/jellyfin)) `GPL-2.0` `C#`
 - [Karaoke Forever](https://www.karaoke-forever.com) - Host awesome karaoke parties where everyone can easily find and queue songs from their phone's web browser. The player is also browser-based with support for MP3+G, MP4 and WebGL visualizations. ([Source Code](https://www.karaoke-forever.com/repo)) `ISC` `Nodejs`
+- [LBRY](https://lbry.com/) - Is a secure, open, and community-run digital marketplace that aims to replace Youtube and Amazon. ([Demo](https://lbry.com/), [Source Code](https://github.com/lbryio/lbry.com), [Clients](https://github.com/lbryio/lbry-desktop)) `MIT` `PHP`
 - [MistServer](http://mistserver.org/) - Streaming media server that works well in any streaming environment. ([Source Code](https://github.com/DDVTECH/mistserver)) `AGPL-3.0` `C++`
 - [NymphCast](http://nyanko.ws/nymphcast.php) - NymphCast is a Chromecast alternative which turns your choice of Linux-capable hardware into an audio and video source for a television or powered speakers. ([Source Code](https://github.com/MayaPosch/NymphCast)) `BSD-3-Clause` `C++`
 - [ReadyMedia](http://sourceforge.net/projects/minidlna/) - Simple media server software, with the aim of being fully compliant with DLNA/UPnP-AV clients. Formerly known as MiniDLNA. ([Source Code](https://sourceforge.net/p/minidlna/git/ci/master/tree/)) `GPL-2.0` `C`