Once Catholic
- Message boards for Catholics who have left the Church and are considering a return. Moderated. No registration required.
- http://www.oncecatholic.org/

Faith Chat
- Low-traffic retromoderated web-based discussions about the Catholic faith. Also offers free POP e-mail accounts.
- http://faithchat.org/

Beliefnet Discussions: Catholicism
- More than a dozen discussion boards. Topics include Church teaching, sacraments and the Mass, the papacy, and women in Catholicism.
- http://www.beliefnet.com/boards/boards_main.AllCategories.asp?Category=58

The Catholic Message Board
- A relatively censure-free web-based discussion forum, so long as you are polite. Anyone can read; registration is required to post.
- http://forums.catholic-convert.com/

Catholic Corner
- All Catholic moderated Java chat environment, faithful to the Holy Father. Also a message board for Catholics and those wishing to learn more about the Catholic Faith, with various forums and topics.
- http://catholic-corner.com/

Venite Adoremus!
- A Catholic forum. Join or start a discussion of current issues in the Church.
- http://www.ok13.com/discus/messages/201/201.html

Anima Christi
- Message boards for prayer requests, reflections on Scripture, and general Catholic topics. Chat room (requires registration), mailing list, links.
- http://www.animachristi.com/