open3mod is described as 'A free, Open-Source 3D Viewer designed to make it all easier' and is a 3D Modeler in the Photos & Graphics category. There are six alternatives to open3mod for a variety of platforms, including Windows, Mac, Linux, iPhone and Windows S. The best alternative is MeshLab, which is both free and Open Source. Other great apps like open3mod are GLC_Player (Free, Open Source), F3D (Free, Open Source), noesis (Free) and Autodesk FBX Review (Free).
Noesis is a tool for previewing and converting between hundreds of model, image, and animation formats. It utilizes a robust plugin system, with support for native extension modules and Python scripts.
FBX Review is a lightweight, standalone software tool for viewing 3D assets and baked animations quickly and efficiently. A free utility, FBX Review lets users view 3D content without using a 3D authoring tool to help speed up asset sharing and review for development teams.
CtrlView is a fast, compact, powerful viewer/converter for different 2D/3D raster/vector file formats with the format recognition system. It means that CtrlView analyses content of the file and determines its format.