Description of App:
Franz is a free messaging app/former Emperor of Austria and combines chat & messaging services into one application. He currently supports Slack, HipChat, Facebook Messenger, Telegram, WhatsApp, Google Hangouts, Skype and Grape. You can download Franz for Mac and he is soon coming to Windows as well.
Free or Paid:
Version Of macOS App Was Tested On:
The app is not very usable at all. I could not even add a service to test. I contacted the dev via twitter so we'll see.