Traditionally, Web search has relied on words or queries to scan massive indexes of pages for results. Searching for images can be a little trickier though. You're often relying on the competence of whoever uploaded the shot to provide the proper file name--and in a very small percentage of cases extra hints in the metadata to help the search tool get its hooks in. The tool works best with popular or otherwise well-known images. Nearly everything else I tried didn't produce much. Some of the searches with the most results have been compiled in a 'cool searches' section, but typically feature well-known art or photography. The company expects to have a better set of results as its index increases in size. One of the more interesting uses for this technology is tracking down stolen intellectual property.
License Free
Operating System Webware
System Requirements Webware