ASUS GPU Tweak III is currently open beta testing so try it out, if you feel it is missing something crucial give ASUS your feedback & they may be able to add it while still in beta. So far ASUS has been very accommodating with all useful feedback..
PowerStrip provides advanced, multi-monitor, programmable hardware support to a wide range of graphics cards - from the venerable Matrox Millennium I to recent AMD Radeon graphics. It is the only program of its type to support multiple graphics cards from multiple chipset...This app doesn't have any features at the moment.
This tool is developed by Ray Adams. ATI Tray Tools is a Full Featured Radeon Tweaker that can be found in the windows tray which then allows instant access to options and settings. Quite handy and quite a small download. Just click the executable and you are good to go.
NVTray provides some extra quality tweaks that both the default NVIDIA tray icon and control panel are lacking. I especially wanted to be able to select more Antialiasing modes, as well as OpenGL and Direct3D options right from the tray icon.