Grant Funding Sources: Home

Run by InfoEd International, SPIN (the Sponsored Programs Information Network) claims to be the most widely used funding opportunity database in the world. An institutional subscription is required for access.

Portal for searching for US federal government grants from 26 agencies of the United States government, including the National Institutes of Health, the National Science Foundation, the Department of Energy, and many others -- in other words, all the most important public funders of research in the United States. Grants.gov is free and does not require a subscription.