NVIDIA's GeForce Experience is now available for everyone in a public beta test, you can get it over here. GeForce Experience is a software tool that will optimize your games' graphics settings, it promises to do a better job than in-game optimizers but it's only available for Fermi and Kepler GPUs. The list of supported games is continuously growing but is largely limited to today's most popular games.
Want to know the best settings to play your games? GeForce Experience will figure it out for you. GeForce Experience connects you to NVIDIA’s cloud datacenter to download optimal game settings tailored to your PC based on your CPU, GPU and monitor. Optimal settings maximize image quality while maintaining great performance so you get the best experience. A built-in interactive screenshot viewer helps you learn more about each setting and their benefits.