Visual Search Engine

TinEye is the first image search engine on the web to use image identification technology rather than keywords, metadata or watermarks. You can submit an image to TinEye to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.

Although some searches are still hit-or-miss, the idea of this as a research tool is pretty cool. Keep on eye on this one!