Here's another digital mode that's becoming quite popular lately on 11mtrs. You may have already heard the distinctive tones of this mode on the Mid Band. There's many stations around Europe at present operating on channel 25 = 27.245 Mhz.
The software is available in many OS versions like Windows, Mac and Linux.
Download Link for the latest versions here.
http://files.js8call.com/latest.htmlScreenshot of JS8 Call Ver 2.2.0