Not a gas mixing program per se. I've looked for one with no luck. It seems everyone is too busy creating apps for the iphone that no one cares about the PC platformed phones! However, I have created an excel worksheet that I've used quite successfully on my laptop and Palm Treo Pro. I'm still working on it to try to make it more like the mixing programs out there, as well as allowing me to choose the top off gas I want to use a little more easily, but I'm missing a couple of equations and haven't had a lot of time to devote to it. I can get the mixes I want from my worksheet in a matter of seconds, though. If you're interested pm your e-mail and I'll send over the file.