Freeplane - Freeplane is a powerful and free software for building mind maps.
Flappy Creator - Create your very own Flappy Bird parody game.
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Timberman - Addictive retro arcade game - the new flappy bird?
Pencil Project - Single-user mockup / wireframing / diagramming tool
Dizzy Dwarves - The Heartstone has been stolen!