NUT-Monitor is a graphical application to monitor and manage UPSes connected to a NUT server. This application is written in Python and PyGTK and uses the PyNUT class.
As this project is still young, you may find some little bugs by using NUT-Monitor.
Don't hesitate to report them to me, i'll try to be as reactive as possible
NUT-Monitor is available as a TAR archive or Debian package.