IGES, which stands for Initial Graphics Exchange Specification ... It also lets you view STP, WRL, PLY, STL, and other 3D files. It basically displays the wireframe of the imported IGS model.

Some of the commonly supported 3D file formats by these viewers include OBJ, 3DS, DAE, FBX, PLY, IGS, IFC, STEP, STL, WRL, VRML, AMF, WRZ, and more. These free 3D file viewer software offers a lot ...