Suprbay
A comprehensive search engine for onion hidden services on the darknet.
Envoy darknet discussion forum
Reddit style deep web forum where users can freely ask questions privately.
Runion is a Russian forum created by people with a “heightened sense of justice, for which anonymity, security and freedom have the highest priority among other aspects of communication.”
Torigon Cyber Security is a forum on the Tor Network dedicated to discussing cybersecurity-related topics.