Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
Hermes - Pandora Client for OS X
ChatSecure - ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
Keybase Chat - End-to-end encrypted chat built into Keybase
pianobar - “pianobar” is a free/open-source, console-based replacement for ...