- Association of American Educators
- Ballotpedia
- Bill of Rights Institute
- Foundation for Economic Education
- Foundation for Teaching Economics
- The Gilder Lehrman Institute of American History
- Global Museum on Communism
- GovTrack
- Historical Documents
- Honest Reporting
- Institute for Energy Research
- Junior Achievement
- Middle East Forum
- Middle East Media Research Institute
- RealClearPolitics.com (U.S.)
- RealClearWorld.com
- SixDayWar
- Tax Foundation