Got all the List of other search engines available from the following link:
http://www.readwriteweb.com/ - Read/WriteWeb is a popular weblog that provides Web Technology news, reviews and analysis. It is the lead blog in the Read/WriteWeb Network, a growing network of blogs about web technology.
Here are the few among them :
http://www.collarity.com/
Collarity quickly and easily integrates with your website to provide automated search and content suggestions, based on the natural communities-of-interest of your audience.
http://www.sproose.com/
Sproose - Human Powered Search! - REAL people shape the rankings on Sproose - leading to REAL results. Unlike other search engines that give results based on algorithms, corporate funding, and the opinions of web masters, Sproose gives the power of search ranking to YOU, the user.
http://www.aftervote.com/
AfterVote(AV) take the results from the 3 major search engines, (Google, Yahoo, MSN) Taking into account their current rankings. AV then weight them against their own database to see what their users have said about where positions should be, and apply that weight to the results. Sometimes users have their own custom algorithm, and in that case you choose how to rank the results, not AV.
http://www.searchles.com/
Searchles is a highly scaleable "social search" platform that showcases expertise, enables collaboration with peers and instantly captures it in searchable knowledge indexes. The platform is a hybrid, combining aspects of "social bookmarking" and "social networking" technology with analytical "social search" capability.
http://vivisimo.com/ or http://clusty.com/
Vivísimo tackle the problem of information overload in web search. Rather than focusing just on search engine result ranking, Vivisimo realized that grouping results into topics, or "clustering," made for better search and discovery. As search became a necessity for web users, Vivísimo developed a service robust enough to handle the variety of information the everyday web user was after. The result was Clusty: an innovative way to get more out of every search.
Clusty queries several top search engines, combines the results, and generates an ordered list based on comparative ranking. This "metasearch" approach helps raise the best results to the top and push search engine spam to the bottom.
http://www.sputtr.com/
Sputtr - Your Search, Your Way!
A refreshingly clean way to search the things that matter the most. With Sputtr you can save valuable time by having all the right searches on just one page!
http://www.soople.com/
Soople a site that softens all the fantastic advanced functions Google offers. This site is meant for all those who are not yet familiar with all the possibilities of Google and all the required syntaxes. Soople is in no way affiliated with or endorsed by Google.
http://googlextra.com/
The Top 100 Alternative Search Engines - http://altsearchengines.com/2007/07/02/the-top-100-alternative-search-engines-july-2007/