Simple RESS
Is a simple PHP-and-cookies based solution to adapt pieces of your web site's content depending on the user's device screen width.
Benefits
- Allows for a more highly configurable responsive design
- Provides the flexibility for custom page elements without the drawbacks of a devoted "mobile" site
- Provides a fallback for devices with JavaScript disabled
Credit
RESS was originally suggested by lukew in RESS: Responsive Design + Server Side Components, and uses the screen width cookie from MattWilcox's Adaptive Images.
Legal
Simple RESS by Matt Stauffer is licensed under a Creative Commons Attribution 3.0 Unported License