Marketing - Dr. McMahon

Charity Navigator - This open source allows you to search for charities, discover or even learn about some of the best charities by cause. 

Pro Publica - Non profit explorer 

Candid-  990 Finder for nonprofts, public charities and private foundations. 

Data USA -  This open source provides aggregated U.S. Government data that can help you locate nformation on industires, jobs, education and more.