The Office of Sponsored Research Administration (OSRA) maintains a list of grant funding opportunities here. The WCM graduate school maintains a list that can be accessed here. Below are additional resources that might be helpful.
All About Grants Podcasts - The National Institute of Health's Office of Extramural Research presents conversations with NIH staff members. Designed for investigators, fellows, students and research administrators, these podcasts provide insights on grant topics from those who live and breathe the information. Podcasts are available in MP3 formsat, and updated every other week.
Foundation Directory Online - Information about the largest 10,000 public and private foundations in the U.S., grant opportunities and links to foundation websites.
Grants.gov - Grants.gov is your place to find and apply for federal grants. The United States Department of Health and Human Services is proud to be the managing partner for Grants.gov, an initiative with unparalleled impact on the grant community.
RePORT (Research Portfolio Online Reporting Tools) - Reports, data and analyses of NIH research activities - replaces CRISP.
SPIN - World's largest database of sponsored funding opportunites. In order to access to SPIN, you will need to log in to wrg.weill.cornell.edu.
GrantForward - Formerly IRIS Database of Funding Opportunities..