A text editor is at the core of the developer’s toolbox, but many other useful pieces of software coexist along with it, such as Git and GitHub. Starting today, Atom adds Git and GitHub integration directly in Atom via the GitHub package. This is a new core package included with Atom and is available right now in today’s 1.18 beta release. Be sure to check out github.atom.io for more information!

Source: Git and GitHub Integration comes to Atom | Atom Blog