Chapter 5 included a number of websites where you can find information on government funders. Here are a few more:

Environmental Protection Agency
epa.gov/seahome/grants.html

This section of the EPA site offers a free tutorial on how to write a grant for the EPA. It takes you through each part of the application, offering tips on what to include and how to say it along the way.

GovSpot
govspot.com

This site has an exhaustive set of links to state agencies plus subject listings for federal agencies.

Grants.gov
grants.gov

You can search here for information on more than $400 million in federal grants. You’ll also find information on the multistep process required to apply online (which is your only option in many cases).