Freeplane - Freeplane is a powerful and free software for building mind maps.
Can't Unsee - A simple game to test your Design skills 🖌
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Color Run - Just tip on the lighter color and be quick
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.
Linia - You will never look at colors the same way...