Codeberg UI appears to be pretty similar to GitHub, so it's great as GitHub alternative. It's powered by Forgejo, fork of Gitea.
Gitpatch is a bit different. It implements a new storage backend and Git library from scratch. It also uses patch-based model for code review vs pull requests, where specially-named branches are used to submit patches and patch stacks.
Codeberg UI appears to be pretty similar to GitHub, so it's great as GitHub alternative. It's powered by Forgejo, fork of Gitea.
Gitpatch is a bit different. It implements a new storage backend and Git library from scratch. It also uses patch-based model for code review vs pull requests, where specially-named branches are used to submit patches and patch stacks.