My latest is a pair of 3D printed Bicycle Rings to be worn on two adjacent fingers (or with a finger spacing in between) and show your love for bicycles to the world. They are 3d printed in stainless steel which makes them super strong and durable. Right now they are available direct from Shapeways (the company that 3D prints my designs). Sizes are limited but I hope to add more soon.
I've also done an instructable on the process that went into making this. I began with a rough sketch of the idea then moved to Rhino for Mac for the 3D modeling. You can read more about it on the instructables site here.
Hope you have a happy 2017!!