Find my Font is a desktop application that helps you identify fonts in digital images. It opens a bitmap image and then searches both online (internet) and all the fonts on your computer and identifies the font(s) used by the letters in the image. You are provided with a list of matching fonts along with the matching accuracy for each one. You may also type text and see how well the matching went. It's ideal for graphic designers and creative professionals who would otherwise spend hours trying to find a matching font.
Find my Font comes in two versions: Free and Pro. The above download is for the Free edition. For a comparison of the versions, see this page.