The Tor Project has officially launched the first beta version of Tor Messenger, an open source and Encrypted instant messaging client that works on top of the Tor network. The team claimed that their app encrypts the content of instant messages as well as makes it very difficult for snoopers and eavesdroppers to identify the user sending them. Tor Messenger can be run on versions of Windows, Mac, or Linux PC. The goal of the team is both to make Tor more accessible and to create a secure chat client.
Source: https://thehackernews.com/2015/10/how-to-tor-messenger.html