YanC or "Yet another nV Configurator" is a small tool which you can use to change the nVidia-specific settings (almost) as easily as with the Windows-drivers. You can edit the settings for the AGP-Support, the Cursor Shadow, the nVidia-Logo, for Digital Vibrance Control and, of course, TwinView.
Furthermore, YanC offers the possibility to run your OpenGL-applications (e.g. games) with your favourite settings for antialiasing, anisotropic texture filtering and vsync to blank without difficult command-line operations. If you're intimidated by setting environment variables or editing your XF86Config file, give this tool a try.

License: free

Additional System Requirements: