The Catalog of Federal Domestic Assistance is a government-wide compendium of federal programs, projects, services, and activities that provide assistance or benefits to the American public. It contains financial and non-financial assistance programs administered by departments and establishments of the Federal government.

This is an EPA website that lists a variety of EPA funding opportunities including Water Grants, Environmental Education Grants, State Innovation Grant Program, STAR Fellowships, and more. It also links to current EPA funding opportunities.

FedBizOpps (FBO) has been designed as a single point of entry for Federal buyers to publish and for vendors to find posted Federal business opportunities across departments and agencies.

Grants.gov is a resource for finding and applying for federal grants. Established as part of the President's 2002 Fiscal Year Management Agenda to improve government services to the public, Grants.gov is a central storehouse for information on over 1,000 grant programs and provides access to approximately $500 billion in annual awards.

The US Department of Health and Human Services (HHS) provides grants, benefit programs for individuals and families, loans, and contracting opportunities.

The NIH Guide for Grants and Contracts is the official publication for NIH medical and behavioral research grant policies, guidelines, and funding opportunities.

An NSF resource for funding search, also featuring a grant proposal guide and programs for undegraduates, graduate students, post-doctoral students, K-12-educators, and small business programs.

NIFA provides annual formula grants to land-grant universities and competitively granted funds to researchers in land-grant and other universities, which address quality of life problems such as improving agricultural productivity, creating new products, protecting animal and plant health, promoting sound human nutrition and health, and strengthening of children, youth, and families.

USDA Rural Development Program helps improve the economy and quality of life in rural America. Its financial programs support essential public facilities and services. It offers technical assistance and information to help agricultural producers and cooperatives get started and improve the effectiveness of their operations, and to help communities undertake community empowerment programs.