Exclusively Nuclear, Biological, and Chemical Weapons Oriented:
International Atomic Energy Agency (IAEA)
James Martin Center for Nonproliferation Studies (CNS)
Nuclear Threat Initiative (NTI)
Fissile Materials Working Group (FMWG)
Bulletin of the Atomic Scientists
Nuclear Proliferation Prevention Project (NPPP)
Project on Managing the Atom (Harvard University)
Council for a Livable World

Nuclear Material Security/Nonproliferation Programs: 
The Stanley Foundation
The Carnegie Endowment for International Peace
The Henry L. Stimson Center
Center for Arms Control and Non-Proliferation
Center fo Strategic and International Studies (CSIS)
Physicians for Social Responsibility (PSR)