I have a PC version of the solitaire version of Quincunx (and Jacynth) at my website. It will work on any modern PC with the Microsoft .NET Framework Version 2.0. It will also work on Linux with Mono version 1.9.1 or higher. I haven't tried it yet with Mac OS.
Game is listed to the right on my site at http://www.jkntech.com/
Thanks much,
J.