iOS multitasking remained relatively untouched for the first several years of its existence, and although iOS 7 revamped its UI, it still maintained the core idea of using one app at a time. AppHeads is an upcoming jailbreak tweak that will reinvent iOS multitasking for some and, at the very least, greatly enhance it for others.
If you're familiar with Facebook Messenger, you probably already have an idea of what the interface of AppHeads will look like. It uses the same round icons as Facebook Messenger, but instead of juggling conversation threads and friends' faces, AppHeads uses these bubbles to manage running applications. You can watch this tweak in action in the video below.