Google search engine is a
visible search. That is, it can only see content visible to it while
information in the visible web is not visible to the software spiders and the
crawlers that create search engine indexes. Since the information invisible to
the crawler forms a great wealth of web resources we practically miss out this
resources when the use the visible search engines for our search.
However, that's where Invisible Web search engines, tools, and
directories come in. 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.
This is a meta search engine, which combines
results from a variety of different sources, filtering out duplicates and
sifting the best content that you might not have seen otherwise to the top of
the search results.
SurfWax is a good tool for delving
into the Invisible Web since it retrieves information you won't be able to find
with other search engines.
This search engine gives you the
option to grab results from multiple search engines at the same time. You can
also create SearchSets, your own personalized sets (lists) of sources that you
save and use over and over.
The Internet Archive is a wonderful
database offering access to live music, audio, movies and printed materials.
USA.gov is a complete mammoth search
engine/portal that gives the searcher direct access to a wide variety of
information and databases from the United States government, state governments,
and local governments. This includes access to the Library of Congress.
This is a real-time search engine dedicated to the
blogosphere. That is, It only searches through blogs to find exactly what
you're looking for.
This is a meta search engine that gets results from multiple search engines and
directories and then presents them combined to the user.
National Geographic's Map Search Engine
This is a gigantic collection of all the National
Geographic maps in a searchable online database. http://maps.nationalgeographic.com/maps
This is an automated question and answering search
engine that does not match your search query in page text and titles like other
search engines do but goes the next logical step and sorts through the search
results for you, then extracts the answer to your question.
Blinkx TV is a search
engine that helps you find audio, video, and podcasts. it uses not only the keywords
and phrases, but also content in the actual clips that you're looking for.
This is a medical information search engine. It is
completely dedicated to finding medical information online.
IMDB stands for Internet
Movie Database. it is the biggest movie database on the Web. Featuring top
movies, movie news, movie reviews, movie showtimes, etc
AuctionMapper
AuctionMapper is a nice search engine that dedicated to only eBay
listings.
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