For private grants, you may want to check the Foundation Center's Foundation Grants for Individuals Online. It's a subscription based website ($9.95 per month) but their opening blurb only says that the database is ideal for "students, ...
An interview with John Elkington, Founder and Chief Entrepreneur, SustainAbility. Social entrepreneurs are generating impressive results — and capturing the imaginations of businesspeople and public policy makers.
Business Grant Application Process | Personal Government Grants