Have you ever seen a font in a magazine or on a website and thought, "Hey, this is the font I want to be able to tell my designer to try in my logo. The only problem is, I don't know what it's called!"
Well, now you can find out at WhatTheFont.com. Upload an image to their database, and it will pick the best match for your scan from the MyFonts.com database. Sometimes it won't get a match, but it's a got a pretty wide library to match from, and even if it can't find the exact font it will specify some that are very close.
