State

Agency for Health Care Administration
Department of Transportation
James & Esther King Biomedical Research Program

Federal

Defense Advanced Research Projects Agency (DARPA)
Department of Homeland Security (DHS) 
Health & Human Services (HHS) 
Office of Naval Research (ONR)   

National Institute of Justice (NIJ)
National Institute of Standards and Technology (NIST)
National Science Foundation (NSF)
National Institutes of Health (NIH) 
 

Private Foundations and Professional Societies

Alfred P Sloan Foundation
AT&T Foundation
Citigroup Foundation
Chicago Board of Trade Educational Research Foundation
IBM Center for the Business of Government
Marketing Science Institute
The MacArthur Foundation

The Robert Wood Johnson Foundation
W K Kellogg Foundation              

Funding Databases

Community of Science (COS) Database

Federal Business Opportunities (FBO)
Grants Net - US Federal Government Grant Opportunities
Illinois Researcher Information Service (IRIS)
ResearchResearch Lite