DoubleTrust
www.doubletrust.net
If you ever wonder whether to search on Google or try Yahoo!, you no longer need decide. Computer-science grad student Ashish Gupta mixes search results from both sites into one list at DoubleTrust.net. Not only does the site return page results that are ranked high by both search leaders but it offers lists of "orphans" -- Google results specifically not shown on Yahoo, and vice versa. And it shows 80 results per page in compact form, far more than either Google or Yahoo.