All the code (so far) has been written by myself.
Steve Evans provided all the graphics.
Peter Banaschak has outlined the installation procedure for Mac OS.
Nick Bardsley and Joe Peterson have detailed installation procedures for Windows.
Mathias Kegelmann has confirmed that the program works on Solaris.
The idea of showing legal moves was inspired by Roland Marounek's Shogi++ program, and further ideas on the subject came from Steve Evan's Shogivar program.
The idea of showing the influence of pieces on a square was inspired by Roland Marounek's Shogi++ program.
Most of the text from the rules.html file came from Steve Evan's Shogivar program. The rule on the hidden defender was copied verbatim from the Middle Shogi Manual by George Hodges.
Dr. Andrew Walker of Nottingham University, has given me lots of advice on how to implement iterative deepening (the computer varies it's depth-of-serach according to how much time is available).
Michael Vanier has helped to clarify the Linux installatuion instructions.