Mind Map described in Wikipedia, the free encyclopedia.

Gliffy is a free online application that does a lot of the things done by Microsoft's Visio and other diagramming software. The software has enough functionality today to serve as a good sketching tool for creating simple flowcharts, network diagrams, or user interface mockups

mind42 brings you free online collaborative mindmapping.

According to the site You can keep track of all your ideas, whether alone, with colleagues and friends or working together with the whole world.

The application is browser based online mind mapping application. With mind42.com installing mindmapping tools is no longer needed- for a hassle-free mindmapping experience. Just open the browser and launch the application when needed.