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, Mac and Windows 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.
Team Foundation Server (commonly abbreviated TFS) is a Microsoft offering for source control, data collection, reporting, and project tracking, and is intended for collaborative software development projects.
Microsoft Team Foundation Server is the most popular commercial alternative to GitHub.
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.
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.
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.
Ship awesome Software! Planio is your all-in-one platform, complete with Issue Tracking, Project Management, Version Control, Help Desk, Wikis and Chat.
Planio is the most popular iPhone, iPad & Android Tablet alternative to GitHub.
GitGud.io is a free Git hosting site powered by GitLab, hosted by Sapphire. Sign up for FREE, via Sapphire Accounts
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.
Mantis Bug Tracker is a free and open source, web-based bug tracking system. It is written in the PHP scripting language and works with MySQL, MS SQL, and PostgreSQL databases and a webserver. MantisBT can be installed on Windows, Linux, Mac OS, OS/2, and others.
For the self-hosting category, it has literally zero dependencies. Every repository is plain as-is-on-the-harddrive, so you have no troubles like in other alternatives with bare repos vs. real repos. Simple install, zero dependencies, works on every VPS.
Online workspaces with best of breed tools like Tasks & Issue Management, SVN & Git Repositories, Kanban Cardwall, Wikis, File Sharing, GDocs & Dropbox Integration, Milestones Management, Time Tracking, Support Tool for Clients, Backlog Manager, Custom Reporting
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Seems to be an alternative to Jira, not to Github.