Idée TiniEye and MultiColr

TiniEye

http://www.ideeinc.com/products/tineye/

TinEye is ab image search engine on the web to use image identification technology. Using sophisticated pattern recognition algorithms, TinEye lets you submit an image to find web pages that contain that image.

MultiColr

http://labs.ideeinc.com/multicolr/

The Multicolr Search Lab (MSL) is a proof-of-concept that demonstrates Idée’s ability to index image by colour. As an image-based ‘labs’ project, the UI naturally reflects a mixture and Google Labs functionality and Flickr’s Web 2.0 styling.

http://richmarr.wordpress.com/tag/image-search/

Idée also has other visual search products. http://www.ideeinc.com/