isk-daemon - isk-daemon is an open source database server capable of adding content-based (visual) image...
TinEye - Reverse Image Search to help find an image's source, duplicates or altered versions.
NISE - The NISE Image Search Engine is a reverse image search engine (like tineye.
CamFind - CamFind is the very first mobile application that can photograph, identify, and provide information...
PicsLikeThat - This is a visual and semantic image search system finding images on Fotolia.
IQDB - Multi-service image search