Atom + GitKraken
Open the current Atom project in GitKraken.
This can be activated from the Packages menu, command palette, from the context menu on the root project folder in tree view, or the git branch indicator in the status bar. ⌥ or ⇧ click will also work here.
An instance of GitKraken will be spawned for each project by default, but can be configured in the package settings to only ever run a single instance of the application.
Install
apm install gitkraken or search “kraken” under packages within Atom.