Threddie – Brainstorming Simplified
http://threddie.com/

Threddie lets you brainstorm with people using a post-and-comment system everyone’s familiar with. Just start a brainstorm, add a briefing and some topics, then invite people to discuss. It’s better than email, yet much more intuitive and lightweight than the mind mapping and diagram drawing alternatives … and it’s free. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This will be added to Entreprenurial Resources Subject Tracer™.