Envy - now EnvyNG:
Interface for the installation of ATI/NVIDIA proprietary drivers with automatic hardware detection ...
X-Kit:
Xorg.conf Parser/Validator written in Python widely adopted in Ubuntu...
Nvidia-common:
Python library for graphics hardware detection and Debconf helper to transition users from obsolete graphics proprietary driver to other drivers in dist-upgrades ...
URandR:
It is a GUI to
RandR 1.2 written in PyGTK. IT covers RandR 1.2 basic functionalities
and aims to make multihead configuration as easy as possible for
inexperienced users ...
Screen Resolution Extra:
Better user notification and easier setup (using PolicyKit and X-Kit) of multiple screens layouts in case of front framebuffer constraints ...