SpiroGraph
Go to the SpiroGraph wiki pageTrains3
Go to the trans3.tcl wiki pagetkEngine
Go to the tkEngine wiki pagePave, sort of geometry manager
Go to the Pave, sort of geometry manager wiki pageZen Loops
Go to the Zen Loops wiki page3D polyhedra with simple tk canvas
Go to the 3D polyhedra with simple tk canvas wiki pageTkPool
Go to the TkPool wiki page