A relatively censure-free web-based discussion forum, so long as you are polite. Anyone can read; registration is required to post.

Message boards for Catholics who have left the Church and are considering a return. Moderated. No registration required.

Message board with general discussion of Catholic topics. Also news items, apologetics. Anyone can read; posting requires free registration.

Canadian Catholic site message boards. A personal initiative. Does not tolerate dissent.

More than a dozen discussion boards. Topics include Church teaching, sacraments and the Mass, the papacy, and women in Catholicism.

Message boards for prayer requests, reflections on Scripture, and general Catholic topics. Chat room (requires registration), mailing list, links.