FreeMind is described as 'Free and open source, Java-based mind-mapping app for the desktop featuring a hierarchical editor that emphasizes folding' and is a very popular Mind Mapping tool in the office & productivity category. There are more than 100 alternatives to FreeMind for a variety of platforms, including Windows, Mac, Web-based, Linux and iPhone apps. The best FreeMind alternative is Freeplane, which is both free and Open Source. Other great apps like FreeMind are Xmind, TreeSheets, Obsidian Canvas and TheBrain.