Awesome
PiClock
A Fancy Clock built around a monitor and a Raspberry Pi
This project started out as a way to waste a Saturday afternoon. I had a Raspberry Pi and an extra monitor and had just taken down an analog clock from my livingroom wall. I was contemplating getting a radio sync'ed analog clock to replace it, so I didn't have to worry about it being accurate.
But instead the PiClock was born.
The early days and evolution of it are chronicled on my blog http://n0bel.net/v1/index.php/projects/raspberry-pi-clock
If you want to build your own, I'd suggest starting with the overview https://github.com/n0bel/PiClock/blob/master/Documentation/Overview.md
If you want to use the PiClock on your desktop (not your Pi), I'd suggest using these instructions. https://github.com/n0bel/PiClock/blob/master/Documentation/Install-Clock-Only.md
All of the extra hardware (IR Remote, GPIO buttons, Temperature, LEDs) are optional, so you can then jump to the install guide https://github.com/n0bel/PiClock/blob/master/Documentation/Install.md
Of course you can jump to the hardware guide anytime https://github.com/n0bel/PiClock/blob/master/Documentation/Hardware.md