Tasker by Crafty Apps

The ability to automate certain tasks that users need to repeat every day is a very important one. It’s true that most automation applications are complex, and users need some time to accustom themselves with the procedures, but when they learn how to use it, the app becomes irreplaceable.
The actions that are available with Tasker include Calendar Insert, Go Home, Kill App, Load App, Open Map, system settings dialogs, Auto-Brightness, Close System Dialogs, Keyguard, Keyguard Pattern, Display Brightness, Display Off Timeout, Display Rotation, Set Wallpaper, Stay On, Status Bar, and many others.
Of course, many of these functions are available only on certain models, but people can expect to find pretty much everything important. To take on step further, Tasker is powerful enough to be used when constructing other apps.