DRIconf is a configuration applet for the Direct Rendering Infrastructure. It allows customizing performance and visual quality settings of OpenGL drivers on a per-driver, per-screen and/or per-application level.
The settings are stored in system wide and per-user XML configuration files, which are parsed by the OpenGL drivers on startup. For more details see ConfigurationInfrastructure.
DRIConf is written in Python with the python-gtk toolkit bindings.