NanoCAD is a Java applet (formerly a Lisp/Scheme
? program) that was intended to eventually evolve into a useful computer-aided design system for nanotechnology. While that goal has yet to come to fruition, NanoCAD has at least influenced the direction of more advanced projects such as OpenChem
? and Fungimol
?.
The NanoCAD Java applet is available to tinker with at http://willware.net:8080/ncad.html