Customize your iOS 7 lockscreen
LockScreen for iOS7 lets you change the design of your iOS 7 lockscreen.
The application allows you to select a custom wallpaper and apply new designs to your lockscreen. Once you've designed your lockscreen using LockScreen for iOS7 you need to set it in the normal way, through the iOS 7 menu (Settings > Wallpapers & Brightness > Choose Wallpaper, then select what you've just made).
Although not revolutionary, LockScreen for iOS7 makes for a simple way to create a custom lockscreen.