PUBLIC MARKS from knann with tag brainstorming

Kayuda is a web-based visual wiki, a mind-mapping tool, and a non-linear writing tool that allows you to track ideas and the relationships between them. It's free, and any number of people can collaborate simultaneously in real-time. You can have any number of "wikis" (called "workspaces"), and you can choose how private to make them.

Sylvia Web BrainStormer allows you to set up and run on-line brainstorming sessions with your colleagues, customers, friends or anyone anywhere who has an internet connection. Web Brainstorming is easy. Just set up your creative challenge, set your evaluation criteria, invite people and start brainstorming. When you are finished, you can vote on the best ideas. Requires registration to participate. All brainstorms are public.