OpenClock shows a clock with an opening so that you can see a photo and even live camera preview through it.
Note that this application keeps your device from sleep mode by default, so please turn off the feature on Settings if you don't want it.

In addition to sleep mode option, you can switch second hand on and off (default) on Settings.

How to use:

-Tapping the digits of the hour, minute, and second changes the color of each digit.
-Tapping the upper ring of the hour, minute, and second handle changes the color of each hand.
-Tapping the lower ring of the hour, minute, and second handle changes the transparency of each hand.
-Tapping the center opening of the screen allows you to set a picture or live preview (iPhone).
-Tapping the upper area of the screen changes the color of the background.
-Tapping the lower area of the screen switches square or full size of the photo.

Supported colors are white, red, green, blue, cyan, yellow, magenta, orange, purple, brown, and black.