GitHub is described as 'Web-based Git hosting service facilitating collaboration, with features like issue tracking, social networking, and wikis for project management' and is a leading source code hosting service in the development category. There are more than 100 alternatives to GitHub for a variety of platforms, including Web-based, Self-Hosted, Linux, Windows and Mac apps. The best GitHub alternative is GitLab, which is both free and Open Source. Other great apps like GitHub are Gitea, Codeberg, Bitbucket and SourceForge.
Apache Allura is an open source implementation of a software forge, a web site that manages source code repositories, bug reports, discussions, wiki pages, blogs, and more for any number of individual projects.
Ship awesome Software! Planio is your all-in-one platform, complete with Issue Tracking, Project Management, Version Control, Help Desk, Wikis and Chat.
Take GitHub to the command line. Create pull requests and issues without leaving the command line. See the status of open issues and pull requests, and see what’s waiting for review. Filter issues and pull requests, and open them in your browser.
Azure DevOps Server is a set of collaborative software development tools for the entire team, hosted on-premises. Azure DevOps Server integrates with your existing IDE or editor to help your cross-functional team work effectively on projects of all sizes.
AWS CodeCommit is a managed source control repository that makes it easier for teams to securely collaborate on code with contributions encrypted in transit and at rest.
Kallithea, a free software source code management system supporting two leading version control systems, Mercurial and Git.
DAGsHub is a web platform based on open source tools, optimized for data science and oriented towards the open source community.
It is a central location where projects can be hosted, discovered, and collaborated on by contributors.
GitFox is your application to manage GitLab projects using an intuitive interface. In addition, it is a showcase of the "Clean Architecture" concepts and some useful libraries.
An all-in-one DevOps platform combining issue tracking, Git/SVN repositories, wikis, CI/CD, and release management—available as SaaS or on-premise for teams that want one integrated solution.
GitGud.io is a free Git hosting site powered by GitLab, hosted by Sapphire. Sign up for FREE, via Sapphire Accounts
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Seems to be an alternative to Jira, not to Github.