Grants.gov - http://www.grants.gov/
Assistance Listings - 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
U.S. Department of Health & Human Services Agency for Healthcare Research and Quality - http://www.ahrq.gov/funding/process/index.html
U.S. Department of Health & Human Services Health Resources and Services Administration - http://bhpr.hrsa.gov/grants/
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 - https://www.education.pa.gov/Pages/default.aspx
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 in Health - http://www.gih.org/About/content.cfm?ItemNumber=2885&navItemNumber=537
Partners in Information Access for the Public Health Workforce - https://phpartners.org/grants.html
National Information Center on Health Services Research and Health Care Technology - https://www.nlm.nih.gov/hsrinfo/grantsites.html
The Commonwealth Fund - http://www.commonwealthfund.org/grants-and-fellowships/grants