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.
Axolo - Reduce pull request time & ship code faster
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
SeekWell - Write code faster and automate reports in Sheets and Slack
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
gitconvex - A web based UI client for managing git repositories