It's a 3D printed hinge that actually works. No support structures. No cleanup. Need I say more?

Okay, fine. It's about the size of two quarters sitting next to each other. It also has a fairly large range of movement. If the hinges's position in the picture was considered 0 degrees, then the hinge can move down to -70 degrees and up to 135 degrees.

This is a key part to a treasure chest I designed in tinkercad. http://www.thingiverse.com/thing:512084/

I hope you all find it as useful as I have. :)