Baptist Joint Committee for Religious Liberty
- Includes mission statement, issues, blog and events calendar, as well as information about supporting bodies and links to resources about church-state separation.
- http://www.bjconline.org/

Texas Freedom Network
- Advances an agenda of religious freedom and individual liberties primarily to counter efforts of conservative political and religious groups. News and issues information, particularly for the US state of Texas.
- http://www.tfn.org/

Religious Freedom Coalition of the Southeast (RFCSE)
- A non-profit, public interest association created to preserve, protect and defend the right to worship as they wish, roll back Religious Right abuses, root out religious and political fraud and corruption, and champion causes which further religious freed
- http://www.tylwythteg.com/enemies/enemies.html

About.com - Myths about Church/State Separation
- Many common myths about the separation of church and state are explained and refuted. Includes misconceptions about court decisions, school prayer, and the US Constitution.
- http://atheism.about.com/library/FAQs/cs/blcsm_index.htm

Strike out "In god we trust" from US coins
- Advocates a stamp to place a slashed circle over the word "god" on US coins.
- http://monotheism.us/coin/

Alliance for the Separation of School and State
- Offers essays and a petition to sign.
- http://www.sepschool.org/

Remove "In God We Trust" from American Currency
- A petition for the U.S. treasury to take out "In God We Trust" on US money.
- http://www.petitiononline.com/igwtrfc/petition.html

First Amendment, à la Carte: Freedom of Religion is Freedom From!
- Lists several news events that raise the church-state issue, asks if government should be involved in religious affairs, and comments on the US Constitution.
- http://www.lacarte.org/freedom/thought/1st/

No to Political Islam, Yes to Human Rights
- An online petition to oppose Political Islam, its agenda, and its barbaric interpretation of Sharia law.
- http://www.ntpi.org/

The Rise of the Religious Right in the Republican Party
- Asserts that the Religious Right's goal of Christianizing America and all elements of society has nearly been attained through gaining control of the Republican Party and putting an ally in the White House.
- http://www.4religious-right.info/

Non-Christian Founding Fathers
- Asserts how and why the USA is now backsliding onto the slippery slope of incremental theocracy.
- http://monotheism.us/

First Amendment Center: Religious Liberty
- Features a number of original publications, a history of religious liberty and of religion in public life, and commentary on recent news items.
- http://www.firstamendmentcenter.org/rel_liberty/index.aspx

Anti-Defamation League: Religious Freedom
- News headlines, position papers, and other resources on issues such as the separation of church and state, the Istook Amendment, and religious freedom in the workplace.
- http://www.adl.org/main_religious_freedom.asp

ACLU - Religious Liberties
- Updates on religious liberties issues from the American Civil Liberties Union.
- http://www.aclu.org/ReligiousLiberty/ReligiousLibertymain.cfm

People For the American Way: Religious Freedom
- Civil libertarian organization opposing the political activities of the religious right in the U.S. and advocating strict separation of church and state. Talking points and position papers on current legislation and events.
- http://www.pfaw.org/pfaw/general/default.aspx?oid=111

Freedom From Religion Foundation, Inc.
- National organization of freethinkers (atheists, agnostics) in Madison, Wisconsin, working to keep state and church separate and to educate the public about the views of nontheists.
- http://www.ffrf.org/

Religion vs. Morality
- The Ayn Rand Institute's views on separation, with quotes from the founding fathers of the US, and commentary on some related issues such as abortion and evolution.
- http://religion.aynrand.org/

Mainstream Loudoun - A Voice for Moderation
- A group of citizens who wish to preserve religious and personal freedom, to maintain the separation of church and state, and to counter the imposition through public policy of one religious tradition over others.
- http://www.loudoun.net/mainstream/

America's Real Religion, by Gene Garman
- Provides primary sources for quotations from Benjamin Franklin, George Washington, Thomas Paine, John Adams, Thomas Jefferson, James Madison, and Abraham Lincoln regarding their personal religion and regarding religion's proper relationship to governmen
- http://www.sunnetworks.net/~ggarman/

Citizens Project
- A grassroots organization in the Pikes Peak [Colorado] region dedicated to upholding the traditional American values of pluralism, freedom of religion and separation of church and state.
- http://www.citizensproject.org/

Torquemada, the Spanish Inquisition and Today's American Inquisition
- Compares elements of the American Christian Right to the Spanish Inquisition.
- http://internettrash.com/users/torquemada

Jefferson 21st Century Institute
- Dedicated to the separation of religion and government. Focuses primarily on constitutionally questionable actions by, or on behalf of, small religious movements.
- http://www.j21c.org/

Church-State Ring
- Webring hosted by the Internet Infidels for pages promoting the separation of church and state.
- http://www.infidels.org/electronic/ring/church-state/

Liberty Magazine
- Dedicated to the preservation of the separation of church and state with an emphasis on the Establishment and Free Exercise clauses of the US Constitution. Online version includes archived versions beginning with the May/June 1997 issue.
- http://www.libertymagazine.org/

Secular Web, The - Separation of Church and State
- Articles on Church / State separation from Secular Web Library.
- http://www.infidels.org/library/modern/church-state/

Hawaii Citizens for the Separation of State and Church
- Defending the First Amendment principle that government must never, by intent or consequence, promote religion or demonstrate any preference for one religion over another.
- http://www.lava.net/~hcssc/

Americans United for Separation of Church and State
- Founded in 1947, AU brings together Americans of many faiths and political viewpoints to defend church-state separation.
- http://www.au.org/