Grants.gov – Searchable database of federal government grants.
Association of Proposal Management Professionals (APMP) – Provides continuing education, accreditation and certification for all aspects of the proposal development life cycle and contract bidding process. Members include professionals from the worlds of federal contracting and procurement, other government agencies, the private sector, nonprofits, and academia.
National Science Foundation – Largest source of Federal funding for basic research at America’s universities and colleges.
Foundation Center – Leading source of information on philanthropy. Maintains a database of more than 100,000 foundations, corporate donors, and grantmaking public charities in the U.S. and 2.1 million of their recent grants.
The Grantsmanship Center – Los Angeles based organization providing a wealth of training resources, workshops and seminars for nonprofit grantseekers.
Community of Science – Largest single source of information on funding programs and philanthropy worldwide. Create custom searches and funding alerts related to your proposal topic.
State Government web pages – Link to official web sites of all 50 state governments of the United States. Follow the links to search for grants available for each state.
US Small Business Administration – Resources to help small businesses find and apply for grants and loans.