FontFinder.ws - Search engine for free and commercial fonts from across the web. Search results include previews and are sorted by relevancy. - http://www.fontfinder.ws/
Free-Fonts.com - Search engine for free fonts on the web. Search results come with preview and download URL. - http://www.free-fonts.com/
FontSeek - Search for free and commercial fonts on the web. Results comes with preview and download link. - http://www.fontseek.com/
Fontresource - Sorted foundries. Directly to creator site. - http://www.fontresource.com/main.html
Font Finder - Tools and Resources for identifying and locating fonts. - http://www.font-finder.com/fonts.html