jQuery pageSlide by Scott Robbin is a great plugin for sliding the entire web page on one side and revealing a pane with information. This can be used to provide context-help for example, when clicking a link in your application or to provide options for an application and after saving them, slide the page back to its initial state.

Great work by Scott Robbin, inspired by Aza Raskin.

Download the files from the GitHub project setup for this purpose.