I work in a physics lab where we do research on fusion energy and find industrial applications of high power acoustic cavitation. I write OS X software to visualize output of physics simulations and to automate calculations for spherical systems. I also write programs in Igor Pro to automate experiments, collect data, and visualize the collected data.
I have a long history (since before MIDI) in computer music. I wrote the first commercially available MIDI voice librarian for DOS. It did not make me rich.
I play around a little with OpenCV under OS X.