Requires Samsung Galaxy Note 10.1
Create home screen shortcuts to open multi window capable applications in a window. You can customize the size of the window the app opens in, as well as whether or not to "pin" it on top of other windows.
Also create shortcuts to open websites in a window (requires a multi window capable browser)
Open multiple instances of most apps (Some apps explicitly forbid multiple instances...such as most internet browsers)
Does not require root access
Should work on any Note 10.1 ROM with Samsung TouchWiz Multi Window
Compatible with framework patches that enable multi window for all applications