From the Foundation Center Website:

Foundation Grants to Individuals Online (http://gtionline.fdncenter.org)
The Foundation Center's online database of more than 6,000 grantmakers that provide support to individuals. Available at a low monthly subscription rate.

Actor's Fund of America - Artists' Health Insurance Resource Center (http://www.ahirc.org/)
A state-by-state listing of health insurance resource for artists and people in the entertainment industry.

Art Deadlines List (http://www.xensei.com/users/adl)
Monthly Internet publication with funding opportunities in the visual arts.

Art-Support (http://art-support.com/index.htm)
Originally created for fine art photographers, this site has evolved to provide information that is valuable for every artist trying to make it in the field of visual art.

Creative Capital's Artist Toolbox (http://toolbox.creative-capital.org)
A listing of career-resource sites for individual artists.

National Endowment for the Arts (http://arts.endow.gov)
Provides information on fellowships for artists.

New York Foundation for the Arts (NYFA) - For Artists (Free registration required) (http://www.nyfa.org/level1.asp?id=1)
Provides information on fellowships and fiscal sponsorship for artists, including NYFA Source a national database of awards, services, and publications for artists of all disciplines.

Theatre Communications Group (http://www.tcg.org/grants/individual.cfm)
Lists grants to actors, directors, writers, and theatre professionals.