General Nonprofit and Interest Group Info

• Meetup.com (web networking for groups)
• Philanthropy Roundtable
• Independent Sector
• The Foundation Center
• Sunlight Foundation
• Center for Political Accountability
• Comparative Nonprofit Sector Project
• Corp. for Natl & Community Service

Data Disclosure

• Open Secrets Lobbying Database
• Lobby Disclosure (Senate)
• Lobby Disclosure (House)
• Lobby Disclosure (California)
• Foreign Agents Registration Act Reports
• Guidestar (national database of nonprofits)
• Capital Research Center
• Media Matters Action
• Sourcewatch

Populist and Liberal

• Open Society Foundations (Soros)
• Center for American Progress
• Netroots Nation
• New Democrat Network
• Third Way
• Campaign for America's Future
• Common Cause
• Concord Coalition
• AFL-CIO
• Change to Win
• Feminist Majority Foundation
• National Organization for Women
• Brookings Institution
• People for the American Way
• The Interfaith Alliance
• Urban Institute
• Progressive Policy Institute
• AARP

Libertarian and Conservative

• Charles G. Koch Charitable Foundation
• Town Hall
• Heritage Foundation
• FreedomWorks
• Tea Party Patriots
• Tea Party Express
• American Enterprise Institute
• National Rifle Association
• CitizenLink.com
• Pacific Research Institute
• Natl Center for Public Pol Research
• Inst for Humane Studies
• Claremont Institute
• Competitive Enterprise Institute
• Americans for Tax Reform
• Cato Institute
• Reason Foundation
• Dynamist (V. Postrel)
• Hoover Institution
• Ashbrook Center