Liberty Fund

Liberty Fund was founded in 1960 by Pierre F. Goodrich, an Indianapolis businessman and lawyer, with the mission of encouraging a deeper understanding of the requisites for restoring and preserving the ideal of a society of free and responsible individuals.

Mackinac Center

Advancing Liberty and Opportunity

The Mackinac Center for Public Policy is a nonpartisan research and educational institute dedicated to improving the quality of life for all Michigan residents by promoting sound solutions to state and local policy questions.

Much of their content applies everywhere.

FreedomWorks

Lower taxes, Less government, more freedom. A grassroots organization that listens to and works with the grassroots. Runs FreedomConnector an sponsors a number of liberty-oriented causes.

Americans for Prosperity

A great grassroots organization with a very large base of support.