GitLab is a on-premise or hosted Git repository management tool. It also includes code reviews, issue tracking, wikis, and continuous integration.
GitLab vs Bitbucket opinions
Best open alternative to Bitbucket, not being a microsoft product is a huge plus!!! :)
Gitea is a community managed fork of Gogs, lightweight code hosting solution written in Go and published under the MIT license.
The easiest, fastest, and most painless way of setting up a self-hosted Git service. With Go, this can be done with an independent binary distribution across ALL platforms that Go supports, including Linux, Mac OS X, Windows and ARM.
Codeberg is a free Git source code hosting service, with the objective to give the Open-Source code that is running our world a safe and friendly home, and to ensure that free code remains free and secure forever.
Launchpad is a collaboration and Bazaar code hosting platform for (primarily open-source) software projects.
Phabricator is a collection of open source web applications that help software companies build better software.
Effective June 1, 2021: Phabricator is no longer actively maintained.https://admin.phacility.com/phame/post/view/11/phacility_is_winding_down_operations/
BountySource is a funding platform for open-source bugs and features.
Anyone can can post a monetary bounty on an open source project's issues (currently only projects hosted on Github are supported), encouraging other developers to come and work on a solution.
sourcehut is a network of useful open source tools for software project maintainers and collaborators, including git repos, bug tracking, continuous integration, and mailing lists.