Git Flow - Git Flow is a very self-explanatory free software workflow for managing Git branches.
Axolo - Reduce pull request time & ship code faster
Working Copy - The powerful Git client for iOS
SeekWell - Write code faster and automate reports in Sheets and Slack
Git-Repo - Manage Gitlab, GitHub and Bitbucket from the command line
gitconvex - A web based UI client for managing git repositories