The most secure and private web messenger in Tor.
Jabjab.de is a free XMPP (formerly Jabber) service and a non -commercial, private project.
Raddle - Question and answer forum
Private, Anonymous & Bulletproof XMPP/Jabber Service
Black Hat Chat
[RAMBLE] offers privacy-respecting user forums for informed discussion, and link and image sharing.
Pitch
Tor-Based Chat For - The Privacy Cautious.
Hidden Answers, where you can ask questions and receive answers from other members of the community.
NULL Message in one of the most secure and quick communicating platform in the Deepweb. All messages are self-destructed in 21 days