The MorphZone web page has had an interview with Guido Mersmann. Guido also known as Geit lives in Germany and started developing software in 1983. His first computer was a Busch209, but later he had a Commodore 64, Amiga 500 and an Amiga 2000. In the interview Guido speaks about his program Grunch.
Website: http://www.morphzone.info