- CompletePlanet
 - Listing of dynamic searchable databases with documents that cannot be crawled or indexed by surface web search engines. - Deep Web Research
- Monitors deep web research resources and sites on the Internet.
- DeepWeb.com
- Overview of the deep Web problem, and solutions for accessing it.
- Invisible Web Directory, The
- Companion to the book by Chris Sherman and Gary Price provides information about searchable databases and specialised search engines.
- MetaQuerier Project at UIUC
- Research projects to help users in finding and querying online databases effectively and uniformly.
- Wikipedia: Deep Web
- Overview and links about the hidden, or invisible, web.
- Yahoo! Search Subscriptions
- Service to search information on password-protected subscription sites such as LexisNexis, the Wall Street Journal, and Consumer Reports.
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