Xmind - Xmind is a brainstorming and mind mapping application.

OpenVoyce - Openly discuss and vote on ideas, opinions and reactions

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

Lampant - Helping organizations find and act on the best ideas

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

Scrivener - Scrivener is a content-generation tool for composing and structuring documents.