Grants.gov - http://www.grants.gov/

Catalog of Federal Domestic Assistance - https://www.cfda.gov/index?static=grants&s=generalinfo&mode=list&tab=lis...

National Endowment for the Arts - http://arts.gov/grants/apply-grant/grants-organizations

National Endowment for the Humanities - http://www.neh.gov/grants

National Institutes of Health - https://grants.nih.gov/grants/guide/index.html

National Science Foundation - http://www.nsf.gov/funding/

U.S. Department of Education - http://www2.ed.gov/programs/find/title/index.html?src=apply-page

Pennsylvania State Agencies - http://www.pa.gov/Pages/Agency-Directory.aspx#.VdTH6qPD-M8

Pennsylvania Department of Community and Economic Development - http://community.newpa.com/programs/

Pennsylvania Department of Education - http://www.portal.state.pa.us/portal/server.pt/community/grants_and_subs...

State agencies - http://www.statelocalgov.net/state-pa.cfm

Foundation Center - http://foundationcenter.org/findfunders/foundfinder/

GuideStar - http://www.guidestar.org/

Council on Foundations - http://www.cof.org/community-foundation-locator

Grantsmanship Center - https://www.tgci.com/funding-sources

Center for Effective Philanthropy - http://www.effectivephilanthropy.org/about/funders/

National Committee for Responsive Philanthropy - http://ncrp.org/partners-members/grantmaking-members-supporters-list

Philanthropy in the News - http://philanthropynewsdigest.org/rfps

Fundsnet Services - http://www.fundsnetservices.com/

Grantmakers for Education - http://www.edfunders.org/our-community/member-organizations

Grantmakers Health - http://www.gih.org/About/content.cfm?ItemNumber=2885&navItemNumber=537