Pictriev

Pictriev is a search engine to find similar faces on the web using face recognition. The results can vary on the resolution or quality of photo.

To get a reliable answer, enter a photo that contains a frontal face with the gap between the eyes more than 80 pixels wide. LINK: Presurfer

Powerset

Powerset is a search engine where you can use spoken language, like 'What are the ingredients in beer?' or 'When did Caesar cross the Rubicon?'

In the search box, you can express yourself in keywords, phrases, or simple questions. On the search results page, Powerset gives more accurate results, often answering questions directly, and aggregates information from across multiple articles. Finally, Powerset's technology follows you into enhanced Wikipedia articles, giving you a better way to quickly digest and navigate content. LINK

Picitup

Picitup is a new picture search engine with a line of tools for content based image retrieval. Picitup has analyzed tens of thousands of images and classified them into categories. The outcome is a category filter that now allows a user to limit their image search to faces, products, landscapes, or color.

Picitup also provides a fun celebrity face match service. Upload a photo of yourself and receive ten celebrity look alikes. LINK