Froogle:
Developed by Google, Inc. One of the most promising price comparison sites to date.
BizRate:
One of the largest price search sites. Over 30 million products listed.
Shopping.com:
Child of Dealtime and Epinions, now merged to provide you with three shopping search engines that feature your products separately, yet the same.
Yahoo Shopping:
Complete Yahoo Shopping data feed creation and maintenance solutions.
MSN Shopping:
Complete MSN Shopping data feed creation and maintenance solutions.
NexTag Shopping:
Complete NexTag data feed creation and maintenance solutions.
PriceGrabber Shopping:
Complete PriceGrabber data feed creation and maintenance solutions.
TomFolio.com
Searchable database of used, rare and collectible books from a group of booksellers.
BookSearcher.org
Large online database of used, rare, hard to find, out of print, antiquarian and collectible books.
Antiquarian Books in Scandinavia
Search the databases of the Scandinavian members of ILAB, International League of Antiquarian Booksellers.