Math | Science | Medical

ChemFinder.Com Chemical SE
Chemical Search Engine
Fluid Dynamics Search Engine
MathSearch -- search a collection of mathematical Web material
Neurological Search Engine not yet open to the public.
OMNI: The UK's Gateway to High Quality Internet Resources in Health and Medicine
ProFusion - Search
PsychCrawler - psychology SE
Scirus - for scientific information

$ = has pay options for placement.
G= SE is Gambling Site friendly.
A = SE carries ADULT sites