Idea Paint - Create a usable, interactive space on any flat surface
Xmind - Xmind is a brainstorming and mind mapping application.
Walls360 - Amazing wall graphics
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Microsoft Whiteboard - The canvas where ideas, content, & people come together.
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.