FlexFinder queries multiple search engines in parallel, and combines the results based on relevance. The user can choose among specialized meta search engines like Health & Medicine, Research & Education, Blogs, Government, or search DMOZ Open Directory, the largest and most comprehensive human-edited directory of the Web.

Port Prophecy is an all-in-one meta search site that allows the user to choose from hundreds of different search engines and directories to query. Also maintains its own free-to-submit directory.