https://tangled.org! Founder/CEO here. We're a new forge building things from the ground up, and are fully federated -- you can host your git repos on your own infra, along with the CI runners. We've also got a pretty neat set of features (if I may say so myself): stacked PRs, Nix-based CI (if you want it), and a fully open protocol (https://atproto.com) to for you and your agents.
Happy to answer any questions.