orbitctl
This is a tool to manipulate the proprietary extensions of the Logitech QuickCam Orbit AF on the Macintosh.
It's not fancy. It can only deal with one device connected. Diagnostics are not very good. If you want to see what's happening in the camera, run a separate tool, like Photo Booth.
For setting the standardized features, https://github.com/jtfrey/uvc-util seems to work pretty well.
running
$ orbitctl
usage: orbitctl cmd [opts ...]
scan
reset
pan left | right
tilt up | down
led on | off | auto
building
cd src
make