From Jujuba Software:
Jujuba Software Clock combines four useful tools in one app. Calendar clock that changes high-resolution background every month. One way to enjoy this app is to keep it running while your Windows 8 device is docked on your desk. It has precision stopwatch and timer, that keeps ticking even when app is moved to the background. Can easily be used as a cooking timer. Alarm clock configurable with up to five color-coded alarms with customizable sounds.