Xmind - Xmind is a brainstorming and mind mapping application.
Gitify - GitHub Notifications on your desktop.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
GitPigeon - GitHub notifications delivered to your Mac
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.
Octobox - Untangle your GitHub Notifications