What are some alternatives?
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.
Mercurial SCM - Mercurial is a free, distributed source control management tool.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Visual Studio Team Services - Visual Studio Team Services (VSTS) provides unlimited Git hosting, cloud build for CI, agile planning and continuous delivery.