Natural Law Party of the USA
- Promotes conflict-free politics for a problem-free nation and proven solutions for America through prevention-oriented government. Was led by Dr. John Hagelin. Defunct as of April 2004.
- http://www.natural-law.org/

3rd Party Central
- Works to raise public awareness of political alternatives and to encourage participation in the democratic process. Features party matchmaker, party information and essays.
- http://www.3pc.net/

United States Pacifist Party
- Worked to give expression within a democratic, electoral context to the belief that military power profoundly contradicts many religious and philosophic principles, and is a practical mistake in our time. Features 1996 platform and contact information.
- http://www.uspacifistparty.org/

Third Party Politics
- Articles about third party politics in the U.S. from a left-of-center perspective. Examines issues of political reform, third party campaigns through history, and issues facing third parties in general.
- http://www.suite101.com/welcome.cfm/third_party_politics

United States Marijuana Party
- Works to help form and support state-level parties. Features a bulletin board, news and links to state chapters.
- http://www.usmjparty.com

Heart Political Party
- Promotes neuropsychological health for all. Features philosophy and strategy.
- http://www.heartparty.org

The Third Party of America
- Works to create a viable alternative to the Republicans and Democrats. Features issues and a discussion forum.
- http://www.3rdparty.org

The Light Party
- Advocates a platform of health, peace and freedom for all. Features FAQ, platform and essays.
- http://www.lightparty.com/