That would be Forgejo. Codeberg is the hosting service which already existed running Gitea before it forked it and started developing it as Forgjo and moving to it from Gitea.

Heliboard which is an active fork of OpenBoard.

Not OP but I would say because it is a smaller list where if you want to donate and make a big difference to the project then you know it is good to give money to pretty much anyone other than the over funded ones.