I made this EAGLE library for the LTC-4027JR 4-digit common cathode 7-segment super bright red LED clock display. As of right now, they're $3.96 on Digikey.com. Since each digit has a common cathode, I have to multiplex the digits to display numbers larger than 9. The library can be used in EAGLE to make schematics and board designs.
DISCLAIMER: I don't know what the hell I'm doing. I'm just really proud of this, and wanted to share it with the internet.