Founderfox - Founderfox makes pitching your startup easy and fun, create pitches anytime, anywhere.
Xmind - Xmind is a brainstorming and mind mapping application.
GoToPitch - GoToPitch.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
IdeaSpies - Sharing ideas that do good
MindManager - With MindManager, flexible mind maps promote freeform thinking and quick organization of ideas, so creativity and productivity can live in harmony.