Indico - A feature-rich event management system

[jdaviescoates]

This looks another great events management system

https://getindico.io/
https://github.com/indico/indico/
https://docs.getindico.io/en/stable/plugins/
https://docs.getindico.io/en/latest/installation/production/debian/
https://sandbox.getindico.io/

I came across it via @luckow's post for Newdle because it's from the same team at CERN.