GroupMap - GroupMap is a software program that allows you to harness group creativity and the power of collaboration through group brainstorming.
Xmind - Xmind is a brainstorming and mind mapping application.
Kinopio - Thinking canvas for mind mapping, brainstorming, and moodboards
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
bubbl.us - Bubbl. us is an easy-to-use, online brainstorming software. With Bubbl. us you can create colorful mind maps and share them with others. Click here to view examples of mind maps that were created using Bubbl.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.