Eastern Orthodox:

• The Official Directory of Orthodox Churches
• Orthodox Church Directory.
• VOITHIA: Christian Orthodox Laity.
• The Christian Activist: A Journal of Orthodox Opinion.
• The Orthodox Page.
• Sts. Constantine & Helen Greek Orthodox Church, Boise, ID. (Rev. Demetios Serfes)
• Orthodox Christian Fellowship.
• Orthodox World News.
• Byzantine Music.

Old Catholic Churches Sites:

• General:
  • American Catholic Union.
  •  
  • The Old Catholic National Directory.
  • Old Catholic Discussion List.
  • Religious Entities Not in Communion With Pope John Paul II
    But Yet Claiming to be Orthodox and Catholic.
  •  
• The Union of Utrecht:
  • Oud-Katholieke Kerk van Nederland.
    (Old Catholic Church of the Netherlands)
  • Altkatholische Kirche in der Schweiz.
    (Old Catholic Church in Switzerland)
  • Altkatholische Kirche in Deutscland.
    (Old Catholic Church in Germany)
  • Alt-katholische Kirche Österreichs.
    (Old Catholic Church of Austria)
  • Église Vielle-Catholique de France.
    (Old Catholic Church of France)
  • Gammalkatolska Kyrkan i Sverige.
    (Old Catholic Church in Sweden)
  • Starokatolická Církev v Ceske Republice.
    (Old Catholic Church of the Czech Republic)
  • Starokcatoliká Církev na Slovensku
    (Old Catholic Church of Slovakia)
  • Starkokatolicka Crkva u Jugoslavij.
    (Old Catholic Church of Croatia)
  • Chiesa Christiana Cattolica.
    (Italian Catholic Christian Church)
  • xx
    (Old Catholic Church of Poland)
  • Staro-Katolicki Koskiól Mariawitów.
    (Old Catholic Church of the Mariavites - Polish and French Provinces)
  • Polish National Catholic Church of America.
  • Koskiól Polsko Katolicki.
    (Polish National Catholic Church of Poland)
• Independent Old Catholic Bodies:
  • L'Eglise Gallicane.
  • Old Catholic Church of the Mariavites.
  • The Free Catholic Church.
  • The Liberal Catholic Church.
  • Old Catholic Church of America.
  • North American Old Catholic Church.
  • Old Catholic Church of Utrecht - Mathew Succession.
  • National Catholic Church of America.
  • Christ Catholic Church International.
  • Christ Catholic Church.
  • Apostolic Catholic Orthodox Church.
  • Independent Catholic Church of America.
  • The Oriental Catholic Church.
  • The Federation of Independent Catholic and Orthodox Bishops. (Founded in 1945)
    • The Christian Catholic Church U.S.A. (Bishop Raymond Sawyer)
    • The Western Orthodox Church in America. (Archbishop David Luther)
  • Ecumenical Communion of Catholic and Apostolic Churches (EECAP):
    • The American Catholic Church. (Bishop Dan Gincig)
    • The American Catholic Orthodox Church. (Bishop Owen Augustine)
    • The American Catholic Church. (Bishop Peter Hickman)
    • The Anglican Church of the United States (Bishop Heron Sam)
    • The Communion of Evangelical Episcopal Churches (Bishop Mike Owen)
    • The Ecumenical Catholic Church (Bishop Ivo Verbeeck)
    • The Free Catholic Communion (Bishop Michael Milner)

Other Sites:

• Polish National Catholic Church.
• Ukrainian Autocephalous Orthodox Church. (Metropolitan Thaddeus Alioto; Bishop Jonah)
• The Antiochian Catholic Church in America. (Bishop Victor Mar Michael Herron)
• Catholic Apostolic Church in North America. (Rev. Tony Santore; Bishop Carlos Duarte Costa)
• Catholic Church of the Americas. (Rev. Ben Evans; Bishop Carlos Duarte Costa)
• The New Catholic Communion. (Bishop Daniel Dahl; Bishop Carlos Duarte Costa)
• Order of the Magnificat of the Mother of God (Apostles of Infinite Love). (Bro. John, a/k/a Pope Gregory XVII)

Protestant Sites:

• Christian Classics.
• World Council of Churches.
• Biblical Studies Foundation.
• Distinctive Church Collection.
• The Community of Taizé.
• The Anglican Communion.
• Die Evangelische Kirche in Deutschland.
• Evangelical Lutheran Church in America.