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This quadcopter was made with 3D Air pen which is probably just another Asian 3d drawing pen (which may not be a bad thing). Build time was approximately 2.5 hours.
http://3dairpen.com/
Now there is also flying RC plane made with 3Doodler.
Update:
here is also tutorial on how to 3d draw your working propeller:
http://diy3dprinting.blogspot.com/2014/08/how-to-make-diy-quadcopter-propeller.html