MSN - The widely known search engine is more business to consumer then business to business.
MIVA - Offers pay per click advertising only to many countries.
Yahoo - Driven by pay per click and then free listings, 2nd to Google in terms of popularity.
Lycos - An old favourite but still quite popular and used by consumers more than businesses.
Alta Vista - Once one of the big search engines, still used though not as popular now.
Ask - Still used by new internet users but not used by experienced surfers.
DMOZ (Open Directory) - An essential directory to be listed in to aid Google rankings.
Inktomi - Offers a free ranking service and a pay per page option, not as essential now.
AOL - Powered by Goggles search engine results, get in Google you get in AOL.
Alltheweb - More USA based search engine but offers free submission.
Splut - UK directory site, free submission and paid option.
Hotbot - Powered by Inktomi database, once a big player in search engines.
Excite - Used by new surfers rather than the experienced internet users.