Kayuda is a free ad-supported AJAX mindmapping / visual wiki tool for mindmapping, brainstorming, and online writing. Users can link any node to any node and store large amounts of text in nodes.

How is this different from any other mindmapping tools:
- Link from any node to any node
- Name your links to show the nature of the relationship
- Store unlimited amounts of text and images inside your nodes
- Each user may have an unlimited number of workspaces, at no cost
- Multiple security levels are available for each workspace so that you can decide with whom and how you want to share your work.
- Did I mention it’s free? (Well, ok, two small text ads in the bottom left corner)

People who might find Kayuda especially interesting:

- Mindmappers
- Graduate students trying to manage thesis notes and drafts
- Speakers trying to prepare for a speech
- Anyone preparing for a difficult conversation (e.g. “I deserve a raise”) who wants to plan the different paths through the conversation