Freeplane - Freeplane is a powerful and free software for building mind maps.
Strokeit - StrokeIt is an advanced mouse gesture recognition engine and command processor.
Linked Ideas - A macOS/iOS apps to treat ideas as links of concepts.
StrokesPlus.net - Mouse Gestures and More for Windows
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.
Easystroke - Easystroke is a gesture-recognition application for X11.