Quasar allows for windowed apps on jailbroken iPads
Quasar is an impressive solution for jailbroken iPads, which will allow users to multitask and run apps in windowed environments. Even more impressive is the app was created by a 15-year old Brazilian high school student. Pedro Franceschi wrote the app, and this isn't even his first one. He has previously made PhySwitch which allows for app switching using the volume buttons, and PhyScroll which allows for in-app scrolling either using the volume buttons or tilting your device.
Quasar is Pedro's third app, and this time he wanted to make his iPad run more like a traditional PC. Pedro thinks that multitasking is the future, and that Apple will implement a better system soon, but in the meantime, he has created Quasar, which allows for apps to run in windows, and be used simultaneously side-by-side on screen. Each app window can be resized, zoomed to full screen, rotated and moved around as you would like.
Of course, you'll need a jailbroken iPad in order to use the app. If you're already jailbroken, you can find the app in the Cydia store for $9.99.