Government Information Portal

General

• Grants.gov Quote from the homepage "...your source to FIND and APPLY for federal government grants"
• Catalog of Federal Domestic Assistance A wide variety of domestic-related grant and information sites.
• USA.gov Search engine for Federal and State agencies in the United States.

Arts

• National Endowment for the Arts
• National Endowment for the Humanities Makes funding available for a broad range of topics

Business

• Small Business Administration Grants Comprehensive list of federal grant sources for small businesses
• Department of Commerce Included international and National Institute of Science and Technology opportunities
• Department of Labor and Employment and Training Administration Grants support training and improvement of America's workforce
• National Telecommunications and Information Administration In support communication industries and the public

Crime

• National Criminal Justice Grants

Education (Students, Schools and Libraries) 

• Federal Student Aid
• Apply for a Grant The Department of Education's (ED) portal site for electronic grants
• Grants & Contracts Broader scope than the e-grants link.
• Institute for Museums and Library Services Wide variety of grants for educational purposes
• NASA Grants
• National Endowment for the Humanities Broad range of topics, but some are specifically for educational programs
• Nuclear Regulatory Commission For both students and institutions

Health

• Office of Extramural Research (National Institute of Health)
• National Cancer Institute
• Substance Abuse and Mental Health Services Administration

History

• National Parks Service

Housing

• Federal Emergency Management Agency
• Department of Housing and Urban Development

Natural Resources and Environment

• Fish and Wildlife Service  Lists a variety of granting agencies involved with FWS concerns
• Environmental Protection Agency (part of grants.gov)
• National Oceanic and Atmospheric Agency (part of grants.gov)

Research

• Extramural Research Funding Opportunities (Environmental Research)
• National Human Genome Project
• National Historical Publications and Records Commission (NHPRC) Apply for grants to study in our nation's archival, science and other research collections.
• National Library of Medicine
• National Science Foundation
• Presidential Library Grants Listing of private foundations associated with the Presidential Libraries which provide grants

Women's Issues

• Office on Violence Against Women (and other grant opportunties from the Dept of Justice) Funds grants to provide aid and protection to victims of violence