Free stuff? Free stuff!
Do something that benefits the RepRap and 3D printing community and get an E3D RAMPS or a Geeetech Melzi!
http://www.youtube.com/watch?v=yBkiNeou0Ys
Does writing yet another introduction to openscad count (from very first steps to advanced uses)? http://www.tridimake.com/2014/09/how-to-use-openscad-tricks-and-tips-to.html 
@Jeremie_Francois absolutely! Leave a comment under the Youtube video and who knows, maybe you’ll have one of the boards in you mailbox next week.