Splint
thingiverse
I made this because I broke my wrist when I was younger and I thought it would be a fun thing to make. It needs straps, and that is pretty much it. It is a work in progress so if you do plan on printing it, you may want to change it a bit.
Download Model from thingiverse
With this file you will be able to print Splint with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Splint.