Software

• DRAWxtl, a program for drawing polyhedral and ball-and-stick images of crystal structures - ein Programm zur Erzeugung von Polyederdarstellungen anorganischer Festkörperstrukturen (mit L.W. Finger, Carnegie Institution Washington)
  see also L.W.Finger, M.Kroeker and B.H.Toby, DRAWxtl - an open-source computer program to produce crystal structure drawings, J. Appl. Cryst. (2007),40, 188-192.
  A reprint of this paper is available here.
• DRAWxtl reference (needs updating).
• PIMM, Pi SCF Molecular Mechanics Program - ein Kraftfeldprogramm zur Modellierung organischer Moleküle (developed in the group of Prof. H.J. Lindner, my thesis advisor, at TU Darmstadt)
• hp2xx, the HPGL converter originally developed by Heinz Werntges (release versions - current is 3.4.4 - should be obtained from ftp.gnu.org, the newest version might also be available here - currently (January 2023) this is the 37th alpha snapshot for version 3.5.
• hp2xx development changelog
• HP2XX reference
• Calcomp tablet driver (source) for XFree86-4.x
• Calcomp driver binary for Linux/XFree86-4.0.3
• Calcomp driver binary for Linux/XFree86-4.1.0
  Note: my Calcomp driver is now included (again) in stock XFree86 as of 4.2.0
  
• Chemtool, a 2D molecule editor for Linux/Unix systems.
• Linux-binaries of Ortep 1.0.3 and some support and conversion tools