grants.gov is your one-stop-shop for federal agency funding opportunities.
foundation directory online - fdo makes it easy to turn foundations into funders. it’s the only resource you need to search for the foundations most likely to give you grants and manage your prospects through to funding.
national institutes of health - nih offers funding for many types of grants, contracts, and even programs that help repay loans for researchers. learn about these programs, as well as about nih's budget process, grant funding strategies, and policies, and more.
national endowment for the arts - an independent federal agency whose funding and support gives americans the opportunity to participate in the arts, exercise their imaginations, and develop their creative capacities