The following list of search engines is considered by the Internet Community to the “Major Search Engines“  most widely used by surfers and internet users. 

AllTheWeb

AltaVista

AOL Search

Ask.com

Google

LookSmart

Lycos

Live Search

Dmoz

Yahoo
These are considered to the Most Widely Used search engines, but having your site included on other search engines as well is always benficial to the presence of your website.