The following link takes you to a great search engine at the Community of Science (COS) that allows the research community to search its extensive and comprehensive database of available funding resource, with more than 23,000 records representing nearly 400,000 opportunities, worth over $33 billion.   http://fundingopps.cos.com/cgi-bin/search

Additional instructions and assistance for searching the database can be found at the UM Research webpage http://www.research.umich.edu/funding/cos.html.