1)   MultiMode 4.6.0
MultiMode allows you to decode and transmit morse code (CW), RTTY, FAX, SSTV, SITOR-B, NAVTEX, PACKET, ACARS, PSK31, ALE, and many other modes on your Macintosh, without any extra hardware.
radio, amateur, rtty, fax, cw, morse, code, sstv, acars, ACARS,