App Switcher Rotator is described as 'This plugin rotates the icons on the iOS4 multitasking bar to the current app's orientation'. There are three alternatives to App Switcher Rotator for iPhone and iPad. The best alternative is Springtomize. Other great apps like App Switcher Rotator are LSrotator (Paid) and SBRotator (Paid).
Springtomize gives you an all-in-one settings page for tweaking the homescreen the homescreen of your jailbroken iPhone. You can disable elements you don't use, or customize the look of the icons, the dock, the folders, the status bar, and the lock screen.
LSRotator lets your iPhone's/iPod's lockscreen rotate according to your device's orientation when you flip your device (like an iPad). Following SBRotator, this tweak comes now to fill the gap and lets you use your device in landscape at the lockscreen too.
SBRotator lets you rotate the homescreen of your jailbroken iPhone in all four orientations, so that the user interface can be displayed in landscape mode, like an iPad. This app is available in the Cydia app store (jailbroken iOS devices only).