AMP Font Viewer - Jump to Download - Download.
What Font Is - Find any font from any image (commercial or free)
Font Viewer - Font Viewer is an application which does exactly that - it views fonts!
FontFace ninja - A browser extension to identify and try fonts on any website
Fontsnatcher - Fontsnatcher helps you in identifying, testing and discovering new fonts and typefaces being used on the internet.
FontScanner - FontScanner is an application that helps you to find any font name, type, size, color, and family.