GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
NotABug.org - Free open-source code hosting.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
GitPrep - GitPrep is a Github clone.
Gitea - A painless self-hosted Git service
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.