Freeplane
5.0 out of 5 stars (based on 1 review)
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Freeplane is a free, open source software application for creating mind maps (diagrams of connections between ideas), and electronic outlines. Written in Java, it is supported on Windows, Mac OS X and Linux, and is licensed under the GNU GPL version “2 or later”.
This software is trade-free because there are no trackers or advertisements.