Open Office
This is a productivity suite (word processing, spreadsheet, presentation / slide show and database.)
http://www.OpenOffice.org

CMap Tools
This is a concept mapping / webbing tool. Great for idea streaming and showing connections between items / ideas / concepts. A food web would be a good example.
http://cmap.ihmc.us

CDInterface
CDInterface is a free tool to create an autorun cd menu for your software collection. The program will organize your software and have all the information you want - title,description,serial number,updates,etc... An easy to use interface. No programming language is required.
http://cdinterface.sourceforge.net/