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