Check out Framadate. It's hosted (and IIRC developed) by the French non profit org Framasoft.
Source code should be here: https://framagit.org/framasoft/framadate/
Check out Framadate. It's hosted (and IIRC developed) by the French non profit org Framasoft.
Source code should be here: https://framagit.org/framasoft/framadate/