TubeGen 3 TubeGen, quite simply put, generates tubes; the kind of tubes it generates is its primary distinction: molecular nanotubes. Originally written to generate just carbon nanotubes, TubeGen now has the ability to generate both periodic and discrete molecular input files for a variety of packages in both the basic Carbon-Carbon flavor as well as alternate compositions (Boron-Nitride, for example). Visit the online tube generator at Online nanotube generator or email me if you'd like to generate larger tubules and require the source code. TubeGen was developed with the financial support of the National Science Foundation.