ToyBuilder Labs is sponsoring a 3D printing competition on Reddit in the /r/3dprinting sub-reddit.
If you have printed an interesting useful object, be sure to check out the competition and enter!
Prizes (for store credit at ToyBuilder Labs) will be awarded for winning 3D printed functional designs.
The competition will run until March 9, 2015, with winners selected and announced by March 11, 2015.
Good luck, and have fun!