Federal

Each day the The Grantsmanship Center posts new federal grants listed on the Federal Register. Registration is required but is free.
http://www.tgci.com/funding/resources.asp

Department of Housing and Urban Development
http://www.hud.gov/offices/adm/grants/fundsavail.cfm

Substance Abuse and Mental Health Services Administration
http://www.samhsa.gov/index.aspx

Environmental Protection Agency
http://www.epa.gov/epahome/grants.htm

Federal Emergency Management Agency - U. S. Fire Administration
http://www.usfa.fema.gov/fire-service/grants/grants.shtm

U. S. Fish and Wildlife Service
http://www.fws.gov/grants/

U. S. Department of Health and Human Services
http://www.hrsa.gov/grants/default.htm

Find and apply for all Federal grant programs
http://www.grants.gov/

National Institutes of Health
http://grants1.nih.gov/grants/oer.htm

Maryland

Maryland's Governor's Office of Crime Control and Prevention
http://www.goccp.org/

Maryland Historical Trust
http://www.marylandhistoricaltrust.net/

Maryland Department of Housing and Community Development - Click on subject list on the left side of the page to view programs and grants
http://www.dhcd.state.md.us/

The Association of Baltimore Area Grantsmakers
http://www.abagmd.org/index.htm

Funding by Area of Interest

National Youth Development Information Center
http://www.nydic.org/nydic/funding/grants.htm

National Center for the Dissemination of Disability Research
http://www.ncddr.org/rr/Grants_and_Foundations.html

Robert Wood Johnson Foundation - Health Related
http://www.rwjf.org/grants/

After-School Programs
http://www.afterschool.gov/

The Foundation Center - Grantmaker Web Sites
http://lnp.foundationcenter.org/finder.html

Education - K-12 Mathematics and Science
http://www.enc.org/professional/federalresources/guidebook/

Humanities
http://ls.berkeley.edu/dept/townsend/hum_funding_sites_top.html