quick3D Viewer 

quick3D Viewer is a productivity tool for lightning-fast 3D file format viewing. This utility is a must for anyone working with any type of 3D graphics files. It supports an expansive range of 3D file formats, major and obscure.
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ThreeDimSim:3D Mechanics simulator 

ThreeDimSim is a powerful 3D mechanics simulation and rendering application. A 3D scene is defined by script using simple shapes and imported meshes from CAD files. Mechanics are simulated and rendered and can be analysed and exported.
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