Big List of Search Engines
By trying a new search engine you will be able to find new interesting websites. These websites are often buried so deep in the results of the big search engines that chances are you'll never find them on Google, Yahoo or Bing.
For those of you searching for places to add your URL i have included a direct link to the add URL page of the search engines that have one.
Major Search Engines
Google is the most popular search engine on the Internet and has both web, image, video and map search plus a lot of other more specialized searches. Add URL
Yahoo Search is the second most popular search engine, with web, image, video, local and shopping search options. They also run one of the most well known directories on the Internet. Add URL
Bing is Microsoft's latest relaunch of Microsoft Live Search and has been growing in popularity thanks to aggressive marketing campaigns. Add URL
Ask is a little bit more cozy than the other major search engines and has a bit more options and visual stuff going on in the default search. Add Sitemap
Alternative Search Engines
There's many alternative search engines to go to when you are tired of the canned results from the big four above.
Cuil claims to have a bigger index than Google but does not have much of a market share yet. Add URL
DuckDuckGo has a silly style but returns some really innovative search results, check it out. Add URL (requires link back)
Entireweb was founded in 2000 by a Swedish company, WorldLight.com AB. They currently have an index of several hundred million pages and serves over 100 million searches every month. They feed their search results to a large network of smaller search engines.
Entireweb is a founded in 2000 by the Swedish company WorldLight.com AB. Currently they index several hundred million webpages and serves over 100 million searches per month. They have an Express Inclusion Program to get included in the index.
Spezify is run by a Swedish startup and has really cool visual search results, like a collage of newspaper clippings and photos. They use third party search providers so you can't submit to them directly.
Secret Search Engine Labs lets you find niche sites that's often lost in the major search engines. It is also family friendly and has some cool SEO and webmaster tools. Add URL
WolframAlpha searches in databases and creates new search results on the fly using mathematical formulas.
For more check out AltSearchengines.com where you will find info on over 4000 additional search engines
Historical Search Engines
Altavista was the first big search engine and is still operational but uses Yahoo search results.
HotBot launched in 1996 as a service of Wired Magazine and was one of the pioneers in search. It is now using Yahoo and MSN search results.