Hi Michael
I am using Equinox Image for guiding, It has a very nice interface and very easy to use. I think it is only written for Sbig cameras, I am using an STi.
There are few glitches with it, it likes to hang every now an then. Force quitting does not help much, you need to restart to get it to operate properly. This is a bit of a pain.
It supports a two camera set up, guide and image with the same program. Also it has a function for differential deflection, guiding, focus control for various brands of focusers, FWHM focusing, sequence generator, drift trend, and a lot of other stuff.
Having this App means I can do every thing on a Mac with out having to cross to the dark side.
It cost around $50 US. Money well spent . You can get it free if you buy an Sbig camera. I found that out after I paid for it.
Cheers
Phil