GitBucket is an open-source self-hosted Git repository with the usual stuff (pull requests, issues, wiki): https://github.com/gitbucket/gitbucket<p>With the 4.20 release it supports squash on merge, which is a premium feature in GitLab.<p>With its very limited (but working) CI plugin, it provides a lightweight alternative to other similar services.<p>(I'm not affiliated, just wanted to raise awareness of the project.)