GrantForward, a service to which OSU subscribes, is a search engine that helps you find grants for your project. Use the “Sign up” or “Sign In” link.
OSU has a subscription to Foundation Directory Online (the Foundation Center database). The link itself is through OSU libraries and can be found here: https://guides.library.oregonstate.edu/grants#s-lg-box-5822984
All discretionary grants offered by the 26 federal grant-making agencies can be found on Grants.gov. These can also be obtained through Cayuse.