The Chronicle of Philanthropy
A newspaper for the nonprofit world, including grant-seekers and makers.
http://www.philanthropy.com

Council for Advancement and Support of Education (CASE)
Resources and tools for grant development in education.
http://www.case.org

The Foundation Center
Information for grant- and support-seekers, with links to private foundations, corporate-giving programs and other sources of nonprofit funding. The Foundation Center publishes The National Directory of Corporate Giving, which lists corporate foundations by interest area, along with information on whether they support operating grants.
http://www.fdncenter.org

UK Fundraising
UK and international fundraising resources.
http://www.fundraising.co.uk/