work on #217

chandler: abandoned
add citadel
sobby: abandoned
add webodf
stopped after "shared text authoring" section

README.md

@@ -347,6 +347,7 @@ Some [Groupware](#groupware) solutions also feature file sharing synchronization
 
 ## Groupware
 
+  * [Citadel](http://www.citadel.org/doku.php) - Groupware including email, calendar/scheduling, address books, forums, mailing lists, IM, wiki and blog engines, RSS aggregation and more ([Source code](http://www.citadel.org/doku.php/installation:source)) `GPLv3` `C`
   * [Cozy Cloud](https://cozy.io) - A personal cloud where you can read your emails or manage and sync your contact, files or calendars, with an app store full of community contributions ([Source Code](https://github.com/cozy)) - `GPLv3` `Nodejs`
   * [egroupware](http://www.egroupware.org/) - Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS.
   * [Horde](http://www.horde.org/) - The Horde Project is about creating high quality Open Source applications and libraries, based on PHP and the Horde Framework. - `GPL` + Various Free Software / Open Source Software Licenses
@@ -443,6 +444,7 @@ Some [Groupware](#groupware) solutions also feature file sharing synchronization
   * [Infinoted](https://github.com/gobby/gobby/wiki/Dedicated%20Server) - A server for [Gobby](https://github.com/gobby/gobby/wiki), a multi-platform collaborative text editor ([Source code](https://github.com/gobby/gobby)) `MIT` `C++`
   * [Only Office](http://onlyoffice.org/) - An office suite that enables you to manage documents, projects, team and customer relations in one place. `AGPLv3`
   * [PHPOffice](http://phpoffice.github.io/) - PHPOffice contains libraries which permits to write and read files from most office suites. `LGPLv3` `PHP`
+  * [WebODF](http://webodf.org/) - Tools and libraries to view and edit Open Document Format (ODF) files.([Source code](https://github.com/kogmbh/WebODF)) `AGPLv3` `Javascript`
 
 ## Password Managers