Freeplane - Freeplane is a powerful and free software for building mind maps.
Flappy Royale - Flap in style with 99 others
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
Flappy Creator - Create your very own Flappy Bird parody game.
Pencil Project - Single-user mockup / wireframing / diagramming tool
Action Heroes - A fast-paced, action-packed endless running game