OBJ_IO, a MATLAB library which reads or writes some of the 3D graphics information stored in an Alias OBJ file.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
OBJ_IO is available in a C++ version and a FORTRAN90 version and a MATLAB version.
OBJ, a data directory which has some examples of OBJ files.