Xmind
From IFORS Developing Countries Online Resources
With its feature of open-source (except some professional features), XMind makes it possible for you to integrate the software into your product, store data into XMind files, or even build your own mind mapping software based on XMind. And we are eager to see that.
As early as in 2008, XMind was awarded the best Eclipse RCP application, then in 2009, the best project for academia in the SourceForge community and one of the PCWorld 100 best products in 2010.
Link to website: https://www.xmind.net/
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