" Kok Chen, W7AY, has provided (imo) some very 'frosty' free programs for Apple computers and one of my favorites is cocoaModem.
Free Mac Amateur Radio Applications and cocoaModem
cocoaModem is a MacOS X application which implements modems
(modulator-demodulators) for some of the Amateur Radio digital modes.
cocoaModem*s name is a reference to the MacOS X Cocoa framework that it uses. cocoaModem supports RTTY (AFSK), PSK31 (both BPSK and QPSK), PSK63, Hellschreiber, a two receiver RTTY interface and a contest interface.

Future plans include MFSK, FSK RTTY, CW, SSTV and support of the SoftRock-40 software defined radio.
Kok Chen's Home Page: http://homepage.mac.com/chen/
Reviews of cocoaModem:
http://www.eham.net/reviews/detail/5663#70086
best2u, Curtis, N6ECT, ~@~
www.flyingsnail.com/AmateurRadio/ARPSN.html
www.flyingsnail.com/AmateurRadio/progresslog.html"

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