osalt.com helps recommend a open source software alternative or replacement for commercial products and even shareware. Remember that open source software is also a freeware alternative.
freshmeat maintains the Web's largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat database, and links to new code are added daily.
Since 1983, developing the free Unix style operating system GNU, so that computer users can have the freedom to share and improve the software they use.