Algorithm Visualizer - Write down your algorithm to be visualized
Xmind - Xmind is a brainstorming and mind mapping application.
The Algorithm Design Manual - Learn about designing and analyzing algorithms
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
State.of.dev - Visualizing the current state of development
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.