Add Mobilizon

README.md

@@ -1228,6 +1228,7 @@ See also _[Monitoring](#monitoring)_
 - [Kyélà](http://kyela.net/) - Participation polls for group events. ([Demo](https://kyela.net/concert/), [Source Code](https://github.com/abienvenu/Kyela)) `AGPL-3.0` `PHP`
 - [LimeSurvey](https://www.limesurvey.org) - Feature-rich Open Source web based polling software. Supports extensive survey logic. ([Demo](https://demo.limesurvey.org), [Source Code](https://github.com/LimeSurvey/LimeSurvey)) `GPL-2.0` `PHP`
 - [Meetable](https://meetable.org) - Event aggregator. ([Demo](https://events.indieweb.org), [Source Code](https://github.com/aaronpk/Meetable)) `MIT` `PHP`
+- [Mobilizon](https://mobilizon.org) - A federated tool that helps you find, create and organise events and groups. ([Demo](https://demo.mobilizon.org/), [Source Code](https://framagit.org/framasoft/mobilizon/)) `GPL-3.0` `Elixir`
 - [Open Event Server](https://github.com/fossasia/open-event-server) - Enables organizers to manage events from concerts to conferences and meet-ups. `GPL-3.0` `Python`
 - [PHPBack](http://www.phpback.org) - The open source feedback system. ([Demo](http://www.phpback.org/demo/), [Source Code](https://github.com/ivandiazwm/phpback)) `GPL-3.0` `PHP`