WPI subscribes to Pivot an online resource which allows you to find, track and share funding opportunities. Anyone with an @wpi.edu address, can register for Pivot, create a profiles and sign up for alerts in your area of interest. More information on Pivot can be found here.
Foundation Directory Online Professional
Provides access to timely, comprehensive information on grantmakers and their grants. Included is a database of the entire universe of over 100,000 foundations, corporate giving programs, and grantmaking public charities in the U.S.; a database of over 4,000 sponsoring companies, offering a quick pathway to corporate funders; a database of over 2.4 million recently awarded grants; and a keyword-searchable database of over 700,000 recently filed IRS Forms 990 and 990-PF.
ProposalCENTRAL is an e-grant making website with listings of funding opportunities by many government, non-profit, and private grant-making organizations.
If you follow a specific agency, check their website to see if they have alerting features.