Grants.gov (Federal)

http://www.grants.gov/  

Grants.gov is your source to find and apply for federal government grants. Grants.gov is a central storehouse for information on over 1,000 grant programs and access to approximately $400 billion in annual awards. 

GetGrants! (California)

http://getgrants.ca.gov/

GetGrants! helps you identify grant programs within State of California Agencies and Departments through a single search, without being required to know the name of the responsible entity.  The information on this website is maintained by the individual grant program managers.