When I started getting into computers in 2010, GitHub was not yet owned by Microsoft, and had several contenders: self-hosted gits, SourceForge, SVN and especially Gitorious. I remember really liking Gitorious.
Well, that was over ten years ago, and now git and GitHub reign supreme. GitLab is the notable exception.
In the wake of how GitHub handled OSS licenses with Copilot, I will start exploring the platform in the next weeks and write about it.