We don’t often have 3D or CAD topics on here, so I’m happy here’s one:
If you know the Fairphone, maybe you also know about the computer mouse by “Nager IT” which strives for fairly produced electronics and is the computer mouse with the fairest working conditions on the market.
Currently they are holding a 3D design contest where the designs will be Creative Commons Attribution-ShareAlike, which is super cool! 
If you have experience with CAD or 3D design, you can find all the details at 3D-Design Contest – Fair IT yourself e.V.
(I also mentioned to them that they can post it on the job board, but meanwhile I thought it’d be useful to have the info here already. )