Xmind - Xmind is a brainstorming and mind mapping application.
WIQ - WIQ improves the productivity of meetings, brainstorming sessions, focus groups and strategic planning sessions.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
Nolt - A fast & beautiful way to collect user feedback
FeatureMap - FeatureMap story mapping, simple and effective realtime collaboration and collective intelligence tool.
Product Pains - Giving users a louder voice to help teams build better products.