Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Netfabb - Innovative software solutions for 3D printing and additive manufacturing.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
ADA STL Viewer - FREE software for visualisation of STL or OBJ meshes
V-Ray - Learn why V-Ray for 3ds Max’s powerful CPU & GPU renderer is the industry standard for artists & designers in architecture, games, VFX, VR, and more.
Free View Expert - Entry level tool targeted for viewing, verifying, dimensioning and communicating 3D geometry...