The Invisible Web refers to the vast amount of content and information that is not easily discoverable in a general search engine query, such as databases, private networks, or password-protected information. However, there are a wide variety of high quality Invisible Web search tools, search engines, and directories that can help you mine this fantastic resource that is considered to be at least 500 times larger than the visible Web.
The following Invisible Web resources will connect you to a virtual goldmine of knowledge, anything from medical dictionaries to moving picture archives to academically vetted articles and journals.
The Invisible Web: A Brief Introduction
Invisible Web Search Engines
Five Search Engines You Can Use to Mine the Invisible Web: There are many Invisible Web search tools that you can use to dive into this wealth of information, as you'll see from the following list.....keep reading
The Search Engine List: All-purpose search engines, visual search engines, people search engines...you'll find all these and more in this list of search engines, a comprehensive guide to the best search engines on the Web....keep reading
FactBites: Factbites retrieves results that are academically oriented, i.e., dictionaries, encyclopedias, universities, and many .org sites (typically non-profit organizations).
Invisible Web Directories and Portals
Invisible Web Directories: Many individuals and institutions have put together invisible Web directories, which you can use as a jumping off point to surf the Invisible Web. Here are just a few...keep reading
Complete Planet: CompletePlanet is an Invisible Web portal with fast service, relevant results, and an easy to use interface. CompletePlanet searches over 70,000+ searchable databases and specialty search engines....keep reading
Medical Information on the Invisible Web: The Invisible Web has a goldmine of medical databases and specialized medical sites that just don't show up on a cursory search in the search engines. Best of all, this information is free....keep reading
Humanities and Literature Resources on the Invisible Web: There are plenty of humanities resources on the Invisible Web, such as arts, literature, and history Web sites that will give you greater insight on what you might be reading for a class or help you on a research project...keep reading
Invisible Web Research Databases and Reference Tools
47 Alternatives to Wikipedia: Wikipedia is perhaps the most popular reference site online, with millions of high quality articles available on virtually any topic. However, there are limits to what Wikipedia can offer....keep reading
Google Scholar: From one place, you can search across many disciplines and sources: peer-reviewed papers, theses, books, abstracts and articles, from academic publishers, professional societies, preprint repositories, universities and other scholarly organizations....keep reading
Find People with the Invisible Web
15 Search Engines to Help You Find Someone: Finding people on the Web is getting easier and easier. Here are fifteen people search engines you can use to find the person you're looking for on the Web....keep reading
How to Find Someone on the Web, Step by Step: Need to find someone? Here's a step by step guide to finding someone on the Web using tools and services that are designed to find people online....keep reading
Use the Invisible Web to Find Public Records
The Top Twenty Essential US Government Web Sites: There are literally hundreds of thousands of US government and government-related Web sites that offer free access to a wide variety of information....keep reading
Books and Printed Materials on the Invisible Web
How to Find and Read Full Books Online: More people than ever before in history are using the Web as a free library, and with good reason: there are literally thousands of free books online that you can download in their entirety, listen to in an audio book version, or simply read within your browser window...keep reading
How to Find Works in the Public Domain: Public domain works are works whose copyrights were issued before 1923, and have now passed into the public domain, meaning that they can be used, reproduced, or incorporated in any way without any restrictions....keep reading