BUSINESS:-
Business.com
GlobalSpec
Nexis (Lexis Nexis)
Thomasnet (United States)

ACCOUNTANCY:-
IFACnet

JOB:-
Bixee.com (India)
CareerBuilder.com (USA)
Craigslist (by city)
Eluta.ca (Canada)
Hotjobs.com (USA)
Incruit (Korea)
Indeed.com (USA)
LinkUp.com (USA)
Monster.com (USA), (India)
SimplyHired.com (USA)
Naukri.com (India)

LEGAL:-
WestLaw
Lexis (Lexis Nexis)
Quicklaw
Manupatra

MEDICAL:-
Bioinformatic Harvester
Entrez (includes Pubmed)
EB-eye EBI's Search Engine EMBL-EBI's Search engine
GenieKnows
GoPubMed (knowledge-based: GO - GeneOntology and MeSH - Medical Subject Headings)
Healia
Searchmedica
WebMD
PubGene
Nextbio (Life Science Search Engine)
VADLO (Life Sciences Search Engine)