This is a bare bones bit of code. The main class is the ModuleManager which can find any .mod files on the MAYA_MODULE_PATH of the current Maya environment. It's primary use is to find and list all the modules; secondarily it can be used to toggle them on and off (by changing the leading + which Maya uses to id a module to a -, or vice-versa). It's pretty dumb (no accounting for file permissions, incorrectly formatted .mod files, etc) but it's handy for quickly testing out configs.
Also included is a GUI class, ModuleManagerDialog, which finds provides a simple GUI for listing, enabling, and disabling .mod files. Again, pretty simple stuff, but people may find it useful.
PS, hat tip to the gang at TAO for the idea of using a context manager to get out of all those stupid setParent("..") calls in Maya GUI work. I could not find the original post where somebody mentioned it - but whoever you are, sir or madam, thank you ever so much.