Specialized

Computational knowledge engine that draws on multiple sources to answer user queries directly.

Combines results from several sources to present the latest user-generated content. Its "buzz-o-meter" measures the current level of activity concerning the topic on Twitter.

A color search engine meant to find items in defined colors.

A search engine that scans the 'for sale' sections of online forums and organizes the data to make the search experience more efficient.

Helps to find similar or alternative websites.

Applies meta-data and visual analysis of images to build search results.

Fragrantica is an online perfume encyclopedia. One of the site's services is a perfume search by color. You can search thousands of images of perfume bottles.