Probably the best feature of Paranoid Android’s version of Android has just been open sourced. Its Halo multitasking will soon start to show up on more custom ROM’s. This feature is kind of a cross between Samsung’s multi-window and Facebook Home’s Chat Heads. When you receive a notification you can reply in a popup box while the app you were using continues to run in the background. Check out the video demo of the feature after the break to get a good look at what it does.