Freeplane - Freeplane is a powerful and free software for building mind maps.
GitPigeon - GitHub notifications delivered to your Mac
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
Neat.run - Neat puts SaaS notifications in your menu bar. Streamline your code review and ship with ease. Preview, triage, and jump to issues in one click or keystroke.
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.
Meteorite - Smarter GitHub notifications.