Gitscout - A beautiful Github Issues experience for macOS
Xmind - Xmind is a brainstorming and mind mapping application.
GitHub Reader - A quick way to browse GitHub issues and pull requests.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.
Codetree - You can manage your entire development process through GitHub.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.