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.
Create Issue Branch - Automates the creation of issue branches on GitHub
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
REVISR - Git Management for WordPress : keep track w/ version control
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
StickyList - Your throwaway sticky note for your daily tasks. Digitized.