Quantum Soft
- Mac OS application for curve fitting, plotting, and data/function analysis.
- http://www.quansoft.com/

Waavebox
- A versatile, easy to use software-based signal generator by Channel D Corporation that is invaluable for audio testing and laboratory applications.
- http://www.channld.com/wvbx.html

Mac the Scope
- A PowerPC-only utility by Channel D Corporation that includes vector trace oscilloscope, spectrum analyzer, 1/3 octave RTA, spectrogram/sonogram displays, and a built-in, versatile and easy to use waveform and signal generator.
- http://www.channld.com/mts.html

TI-Graph Link
- A Macintosh program, by Texas Instruments, that interacts with the TI-73, 83, 86, 89, and 92 models of their graphing calculators.
- http://www.ti.com/calc/docs/link2macbeta.htm

Lightwright & Beamwright
- Two utilities by John McKernon Software designed for lighting electricians and designers in theatrical environments.
- http://www.mckernon.com/

Douglas Electronics, Inc.
- Douglas Electronics, Inc. offers everything for the electronic designer, from free and commercial design software through prototyping boards and production services.
- http://www.douglas.com/

WaveMetrics Home Page
- WaveMetrics produces the IGOR family of technical computing products for the Apple Macintosh Computer. WaveMetrics products are used by scientists and engineers around the world.
- http://www.wavemetrics.com/