Android: Floating apps are one of the coolest features on Android tablets, allowing you to use all that extra screen real estate. Multitasking for Android offers a whole suite of them in a single package.
The app runs in the background with an always-available sidebar you can slide out from the left side of your display. It comes with a collection of mini-apps that all float including a calculator, calendar, notepad, browser, map, voice recorder and a bunch more.
Multitasking Pro [Google Play Store]