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 ## Web / Network applications
 
-#### Communication
+#### Communication & Collaboration
 - [BigBlueButton](https://bigbluebutton.org) : Videoconference developed for distance learning, with slide presentation, _whiteboard_ and polling
 - [Jitsi](https://jitsi.org) : « _Open source alternative to Zoom&trade;_ » with instant messaging, voice over IP, video conferencing and end-to-end encryption
 - [Matrix](https://matrix.org) :  Open standard for interoperable, decentralised and real-time (also audio/video) chat communication
-- [Mattermost](https://mattermost.com) : Free, self-hosted instant messaging dedicated to organisations or companies 
+- [Mattermost](https://mattermost.com) : Free, self-hosted instant messaging dedicated to organisations or companies
+- [Mobilizon](https://joinmobilizon.org) : Event organisation and group management 
 
 #### Design
 - [Penpot](https://penpot.app) : Open source design and prototyping platform