501(c)(3) organization
type of nonprofit organization in the United States exempt from federal income tax
Plymouth Antiquarian Society
Poetry Foundation
Point Foundation
Polaris Project
private foundation
Vote Smart
Promoting Enduring Peace
Public Campaign
Public Radio Exchange
REFORMA
United States Association of Blind Athletes
Rose City Rollers
Ruby Central
Sam Adams Alliance
Association for Psychological Science
The Sentencing Project
Corporation for Digital Scholarship
Share Our Strength
Metropolitan Council on Housing
March of Dimes
Society for Commercial Archeology
Society for Historians of American Foreign Relations
Atlantic Council
South Bay Historical Railroad Society
StandUp for Kids
Street Law
Student Press Law Center
TOPS Club
Texas Book Festival
The Archaeological Conservancy
The Conference Board
The Crucible
The Institute for Bird Populations
The Jack Kerouac Writers in Residence Project of Orlando, Inc.
The Mountaineers
The Society for the Study of Amphibians and Reptiles
The Voter Participation Center
Tiger Woods Foundation
Transportation for America
Triangle Arts Trust
True the Vote
Turtle Island Restoration Network
USA Shooting
United States Army Aviation Museum
United States Naval Institute
University of California Student Association
Vegan Outreach
Watsi.org
West Coast Infrastructure Exchange
Women Employed