ctxapi is a Linux/MacOS library for monitoring and configuring Carnetix CNX-P2140 DC-DC converters. It comes with a command-line management tool, ctx, and a command-line monitoring application, consolemon.
ctxapi replaces the Windows-only program PSUmoni (except that it has no GUI). It was written by Robotics @ Maryland alumnus Steve Moskovchenko.
An older release is also available: ctxapi-0.2.tar.gz.
You must install libusb (version 0.1.x).