This app is a very efficient task switcher. It shows your recent apps in a notification, so whenever you need them, just pull down your notification shade. It's easy as that!
* Up to 10 apps visible at once - depending on your screen size and orientation
* Readily available - just pull down the notification shade!
* Notification stays always on top of other notifications
* Starts automatically
* Widget allows adding recently used apps to homescreen and lockscreen
Source code available in GitHub: