just recently there’s been a boost in the popularity of OpenSCAD as the tool of choice in the 3d printing community. [Gavilan Steinman] is putting out a series of webTV shorts on the utilize of OpenSCAD. While it lacks a great deal of the features of big CAD fits (such as the ability to produce drawings of your parts), the community has proven it’s effectiveness as a design tool. There are only two episodes out so far but they cover OpenSCAD, mathcast, 3d printing, and a truly neat robot design. Watch them below.