cocoaPath
Free tool that implements an HF Channel Simulator
Kok Chen Free Downloads
Serial Tools
A set of serial port tools for Mac OS X
SerialManager
Free Cocoa class that simplifies the use of serial ports
uH Utils
An application for downloading new firmware to a microHAM micro KEYER, micro KEYER II, DIGI KEYER or CW KEYER
uH Router
Allows multiple apps to concurrently use functions in a microHAM micro KEYER, micro KEYER II, DIGI KEYER or CW KEYER
AVR Tools
Uses avrdude to download hex files to the Atmel STK500 AVR programmer
cocoaPTT 2.0
Helpa you the Request To Send (RTS) or the Data Terminal Ready (DTR) pin of a serial port
cocoaModem 2.0
Implements modems (modulator-demodulators) for some of the Amateur Radio modulation modes