Xmind - Xmind is a brainstorming and mind mapping application.

Draw.Chat - Anonymous real-time whiteboard with text and video chat.

MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.

Limnu - Sketch, share and collaborate with your team

MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.

Sketchboard.io - Visual Remote Teamwork. Solve problems and create ideas on endless whiteboard with your teammates by sketching.