The latest version of the OpenCTM 3D mesh viewer (part of the OpenCTM v1.0.2 SDK) has support for loading, viewing and saving several different file formats (OpenCTM, COLLADA, STL, PLY, OBJ and 3DS), making it a convenient companion tool for 3D graphics developers and artists. The viewer uses OpenGL for its 3D view and GUI, and works under Windows, Mac OS X, Linux, etc. OpenCTM is a file format, software library and a tool set for compression of triangle meshes. It fits well with the current OpenGL rendering pipeline, with support for custom shader attributes among other things.