Creative Commons Search
- Powered by Nutch, it searches for content which can be re-used (for some uses) without having to pay or ask permission.
- http://search.creativecommons.org/

360view4u
- Searches RSS feeds: news articles, press releases, news archives, and blogs, using the Google XML service.
- http://www.360view4u.co.uk

Thagoo
- Searches millions of user's categorized favorite links using the most popular social bookmark sites, using classification by tags.
- http://thagoo.com

ZoomInfo
- A business information search engine, providing company search, people search and job search. It constructs profiles on people and companies, drawn from the Web, or created by individuals and companies for themselves.
- http://www.zoominfo.com/

SearchIRC
- Search Internet Relay Chat rooms and networks.
- http://searchirc.com/