www.dafont.com
There are thousands of free fonts to be found on this site, all organised in different categories.

www.fontshop.com/freefonts
With just about everything you could want to know about fonts, Fontshop also has regular font giveaways.

www.betterfonts.com
This website has a huge number of fonts presented in a clever viewer that includes a preview of each one.

www.urbanfonts.com
This site offers another large collection of fonts - there should be something here for everyone.

Source 'Computer Active magazine'