I've used Makehuman to create the body and imported it to blender to adjust a pose. From Blender you can export to obj file. Or you make a pose direct in MakeHuman and export directly to obj.For object files is an import written by Max Smirnov. You can find it here: http://moi.maxsm.net/startpos/8
Maybe it's useful to reduce the size with a lower detail with MeshLab or something else.