"Brainstorming made simple." This free, web-based softward lets you create mindmaps that are great for brainstorming, organization, and study/review for exams. You can collaborate with others by sharing your maps online.
Part of Microsoft's FutureLab project, Exploratree is a free, web-based "thinking guide" software, similar to mindmapping. Useful for planning, group projects, and examining complex issues and ideas.
Free online web program that lets you generate, organize and capture your ideas.
Anywhere. Anytime.