Xmind - Xmind is a brainstorming and mind mapping application.
Flare by GoDaddy - Discover, give feedback and support startup ideas
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Generating Product Ideas - Find ideas for your next business or side project
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
Wittycircle - Networking tool for entrepreneurs, makers and curious minds.