So, from the archives (aka bookmorks)

• savannah.gnu.org/
• @boneidol pointed in the direction of git.coop/users/sign_in (you have to join the coop)
• if you are a member/supporter of FSFE git.fsfe.org would be an option, don't know if FSF offers something similar
• for the Chaos peer-group, there is chaos.expert/

And then the corporate backed services, gitlab.com and bitbucket.com