SourceForge is described as 'Open source community and software directory offering code hosting, analytics, version control, project management, and access to over 50,000 business titles' and is a very popular Version Control system in the development category. There are more than 50 alternatives to SourceForge, not only websites but also apps for a variety of platforms, including Self-Hosted, Linux, Mac and Windows apps. The best SourceForge alternative is GitHub, which is free. Other great sites and apps similar to SourceForge are GitLab, Codeberg, Gitea and Forgejo.