The Wave Pump - This is a wave-driven drainage pump with no moving parts. It can cheaply be made of concrete and may be useful where the sea level is rising.
Four Blades Pump Mechanism - Parasolid,SOLIDWORKS - 3D CAD model - GrabCAD
Steam Engine VII Mechanism - STEP / IGES,SOLIDWORKS,Parasolid - 3D CAD model - GrabCAD
10 ridiculously satisfying, perfectly looped mechanical GIFs to entrance you | 22 Words
Geneva Drive Array [GIF]
Automata Stargate Event Horizon Iris Free Papercraft Download | PaperCraftSquare
Some sexy gun GIFs for you all - Album on Imgur
Wooden Desk Tray Plans - Woodworking Plans and Projects | WoodArchivist.com