GoKookyGo - http://www.gokookygo.net/
Metasearch service. Thumbshots and images, videos, pdf's can all be searched as well as Amazon and iTunes directly.
Linkopedia - http://www.linkopedia.com/
Paid listings where users can search for specific sites of search through the categories.
Scour - http://www.scour.com/
Users can search through combined results for several search engines including Google, Yahoo, Bing, and OneRiot.