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.
Deck of Cards - A new way to play your favorite card games.
Pencil Project - Single-user mockup / wireframing / diagramming tool
Color Run - Just tip on the lighter color and be quick