3D Models & tools

1) Open .obj 3D format

view3dscene
$sudo apt-get install view3dscene

meshlab - System for processing and editing triangular meshes
$sudo apt-get install meshlab

g3dviewer
$sudo apt-get install  g3dviewer

Other tools

1. glc_player which is said to read-and-show '.3ds', '.obj', '.stl', '.off', '.3dxml', and Collada ('.dae') files
2. g3dviewer which is said to read-and-show '.3ds', '.lwo', '.obj', '.dxf', '.md2', '.md3', '.wrl', '.vrml', '.dae' (COLLADA), '.ase' (ASCII Scene Exporter), '.ac' (AC3D)
3. ivview which reads-and-shows '.iv' and VRML1 files
4. paraview which reads-and-shows '.ply' and '.vt*' files
5. varicad-view which reads-and-shows '.dwg' (2D), '.dxf' (2D only?), '.igs' (maybe?), '.stp' (3D) files 
6. wings3d - Nendo-inspired 3D polygon mesh modeller (legacy)
7. gmsh - Three-dimensional finite element mesh generator
8. libadmesh-dev - Tool for processing triangulated solid meshes.
9. libgmsh-dev - Three-dimensional finite element mesh generator.
10. libmadlib-dev - mesh adaptation library
11. libnglib-dev - Automatic 3d tetrahedral mesh generator development files
12. libscotch-dev - programs and libraries for graph, mesh and hypergraph partitioning
13. netgen - Automatic 3d tetrahedral mesh generator
14. libtriangle-dev - High-quality 2-D mesh generator development files

Resources
 [1] mview http://mview.sourceforge.net/

Models
  [1] .max, .obj, blender, etc. www.turbosquid.com
  [1] http://tf3dm.com/