Look to the OSSwin Project for Freebies
The OSSwin project contains hundreds of links to the home pages of free software programs that run on Windows. It offers 42 major categories of software applications, such as Audio editing tools, Graphics, Databases, Instant Messaging, Utilities, Webcam, Media players, Office tools, and more. This site is a great place to go if you're looking for something special. For example, students may want to explore the Math and Science links or the Encyclopedia links. The site's collection is huge but doesn't include any games