Windows
Some useful Windows desktop programs ...
Mindmapping
FreeMind -Â a premier free mind-mapping software written in Java. Operation and navigation of FreeMind is faster than that of MindManager because of one-click "fold / unfold" and "follow link" operations.
FreePlane - free and open source software to support thinking, sharing information and getting things done at work, in school and at home. The core of the software consists of functions for mind mapping, also called concept mapping or information mapping, and tools for using mapped information. Freeplane runs on any operating system on which a current version of Java is installed and from USB. FreeMind fork.