IRS Site For Tax Exempt Organizations - This site provides information regarding the requirements for tax-exempt organizations, how to apply for recognition of tax-exempt status by the IRS, and the annual filing requirements for tax-exempt organizations.

Council on Foundations - The Council on Foundations is an association of foundations and corporations that serves the public good by promoting and enhancing responsible and effective philanthropy. Includes a directory of community foundations and information on establishing a foundation.

National Charities Information Bureau
Promotes informed giving and charitable integrity. Provides information that enables contributors to make sound giving decisions.  Every charity should be familiar with the NCIB's Standards in Philanthropy, which are available on the NCIB web site.