Grants.gov is the most comprehensive source for information on federal funding opportunities and offers a variety of subscription services. This web portal posts federal discretionary grants for all of the 26 federal grant-making agencies.
Other Federal Funding Resources
Published by the Office of the Federal Register, National Archives and Records Administration (NARA), the Federal Register is the official daily publication for rules, proposed rules, and notices of Federal agencies and organizations, as well as executive orders and other presidential documents.
Catalog of Federal Domestic Assistance (CFDA) provides a full listing of all Federal programs available to State and local governments (including the District of Columbia); federally-recognized Indian tribal governments; Territories (and possessions) of the United States; domestic public, quasi- public, and private profit and nonprofit organizations and institutions; specialized groups; and individuals.
FedBizOpps is the single government-wide point-of-entry for federal government procurement opportunities worth more than $25,000
Links to agency scientific research and development (R&D) grants under the SBIR (Small Business Innovation Research) and the STTR (Small Business Technology Transfer) programs.
Investigators may search the NIH website directly for funding opportunities and register to receive NIH funding opportunity email updates: http://www.grants.nih.gov/grants/guide/listserv.htm
Researchers may search the NSF website directly for funding opportunities and subscribe to a customized funding update service: http://service.govdelivery.com/service/multi_subscribe.html?code=USNSF&custom_id=823