Qmind is a mind mapping App for OS X compatible with FreeMind. Many features of FreeMind are yet to be implemented.
First clone the project. Then,
$ git submodule update --init
$ xcodebuild -scheme Qmind
If you want to contribute, please contact me first.
The source code of Qmind is licensed under GNU General Public License version 3 as published by the Free Software Foundation.
For more details, see Wiki.