Clark Collection
Austringer writes –

I was looking for inspiration for a linkage to remotely open the dust collector port on the back of my table saw. What I found was like getting a drink from a fire hose. You have to poke around a bit since they amazing stuff isn’t right there on the surface but they have a ton of pictures of static models and videos of the various mechanisms at work. That they have videos of models made using a 3-D printer is like a creamy center made from pure whipped geekyness.

KMODDL – Kinematic models for design digital library – Link.