GitHub Reader - A quick way to browse GitHub issues and pull requests.
Freeplane - Freeplane is a powerful and free software for building mind maps.
Shrink for Github - A macOS app for your Github issues
SuperNotecard - Introducing SuperNotecard. SuperNotecard is an online writing tool that features virtual notecards to help arrange facts or scenes, track details, organize paragraphs, and clarify your composition process.
Fire bot - Let your whole team create GitHub issues via email 🔥✉️️
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.