- OS Living - Great index, cut into categories.
- Wikipedia - List of free open source software.
- OpenSourceList - Anthoer category based list, some of the stuff here are Close Source, but still free to use.
- 50 Apps to manage your Office with open source - This list consists over linux based programs, but i think that Ubunut is anyway the number #1 replacement for windows in offices (except mine where everyone got a mac, haha).
- 5 Business free applications - why pink?! :)