XMind is our preferred open source Mind Mapping application for use on the Desktop.
XMind comes out ahead of other alternatives such as the very good FreeMind, simply because it renders better maps, is easy to use, and has a very large community of users and shareable mindmaps published on the XMind website for you to download and try. As an open source
alternative to the commercial MindManager application this is as good as an alternative you can find in the open source world.
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