This software is written in C++ using Qt libraries on Linux.
It reads a description of the controls that the V4L2 device supports from the device, and presents the user with a graphical means for adjusting those controls.
It allows for controlling multiple devices.
Controls can be updated with the device status either manually, or periodically.
There is an easy way to reset one or all the controls to their default state.

A list of device files can be given on the command line.
If no files are given, the program will check the V4L2UCP_DEV environment variable.
If it is set, that file will be opened.