Briar (software) – uses onion services as address when message medium is internet [10] Cryptocat [11] (defunct) Keybase [12] Ricochet (software) - uses Tor network by default for message sending and receiving [13] TorChat (defunct). 4 nov. 2019 · Just two months of being taken down for criminal and dangerous activity, 8chan — now 8kun — is back, and reportedly asking users not to commit crimes.