In the book Word Processing in Groups by David Epstein, there is a pair of pages, 38 and 39, which have two pictures on them. If you are familiar with the book, you probably know exactly what I am talking about. The one is a tessellation of the hyperbolic plane and the other is the Cayley graph of the group produced by the reflections (it is the 2-3-7 coexter group.) In the caption below, it mentions they drew these with the program "gm" which David Epstein and Steve Rumsby wrote.
I was wondering if anyone knew where I could get this program or if they have a copy themselves. I have looked everywhere I can think to, including the The geometry center.
Alternatively, is there another program which draws hyperbolic tessellations better than the ones in this post? I have tried all of them, and non-euclid fails after... ahem, "a few" reflections. The others do not seem to want to reflect well in general. Thanks in advanced.