Are you searching for a Free and Open source software for your CAD CAM or even CAM operations?
CAELinux is the best option for you!
Have a look at CAELinux latest stable version features
CAE Pre-post processors: Salome_Meca 2013.1
Salome_Meca 2013.1 package consists of Salome 6.6, GMSH 2.5, Netgen 4.9, Tetgen, ElmerGUI 6.2, enGrid 1.4, Helyx-OS, Discretizer / Discretizer::Setup, Paraview 3.10, CGX 2.6 applications for your pre processor computing operations
CAD-CAM Packeges: LibreCad, SagCad,
FreeCAD 0.13, Salome 6.6, Meshlab,
Blender, OpenSCAD, PyCAM 0.6, GCAM, Dxf2Gcode, Inkscape Gcodetools, cadpy, Cura
Finite Element solvers: Code_Aster STA11.3 MPI, Elmer v6.2 MPI,
Calculix 2.6 MT, Impact FEM MPI
Computational Fluid Dynamics: OpenFOAM v2.1.1 and Code-Saturne 3.0 both with CFD analysis wizard and tutorials , Elmer FEM Solver, Gerris flow solver, Javafoil, Javaprop and XFLR5 air foil, propelers and airplane analysis tools.
Multibody dynamics : MBDyn with its Blender interface
Electronics: GEDA suite, Kicad, Fritzing, Arduino, dxf2gcode & cadpy for isolation milling
3D bio-medical image processing: ITK-Snap with user filters, Image J, Voxel_Mesher
Mathematics & programming : GNU Octave + QtOctave, Scilab, wxMaxima, R & Rkward, Python Scipy and Spyder, QT Creator, gcc, gfortran, g++, perl, python, ruby compilers/interpreters, Arduino 1.0 IDE
The best thing is - all of the above mentioned software packesges are free and in Built
You may download the Stable version (latest - 2013) over here
http://www.caelinux.com/CMS/index.php?option=com_content&view=category&id=69&Itemid=41&layout=default
to be updated : -
CAE Linux tutorials in PDF
ELMER Tutorials Pdf
KiCAD Tutorial
QT Octave Tutorials
MESHLAB Tutorial in PDF