American Council for Capital Formation promotes economic growth through sound tax, regulatory and environmental policies.

Americans for Fair Taxation seeks to replace all federal income taxes with a single rate retail sales tax. Access news articles and updates.

Focuses on the cost of government, supermajority tax limitations and flat tax proposals. Offers grassroots resources.

A 600,000-member nonpartisan organization that educates the public about waste, mismanagement, and inefficiency in the federal government.

Consumer group focused on free enterprise. Also promotes free trade and lists links to related articles.

Promotes fair taxes for low and middle-income people, and advocates higher taxes for the wealthy and closing corporate loopholes.

Conservative think tank touches on such issues as changing tax rates, instituting a flat tax and repealing the estate tax.

Grassroots network of taxpayers educates the public and lobbies lawmakers on tax concerns. Includes its agenda and congressional news.

Policy research organization that monitors federal, state and local tax issues. Focus on tax reforms and burdens.

Public-interest organization aims to combat fraud against the federal government. Includes details on the False Claims Act.