3. Study - 3D Printer Software on Linux
Slic3r : G-code generator for 3D printers
http://slic3r.org/
https://github.com/alexrj/Slic3r
GPX : Gcode to x3g conversion post processor
http://www.thingiverse.com/thing:81425
https://github.com/whpthomas/GPX