Please put only free software according to the GNU free software definition on this page. This type of software is sometimes known by other names, such as OSS: Open Source Software, FOSS: Free and OSS, FLOSS: Free/Libre and OSS (just in case there weren't enough acronyms in the world already :-).

Software that doesn't cost anything should go in Freeware.

You can find an excellent list of free software for Microsoft Windows at The OSSwin project: Open Source for Windows!. Other useful sites to check are Freshmeat and SourceForge. Another site that has a useful list of both free and proprietary software is http://www.acro.edu.au/acrotools.html.

A selection of free software: