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/
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/