A vital component of playing hands-free is some form of voice recognition software. To fulfill this need, there are two major players in the market: Dragon NaturallySpeaking and Windows Speech Recognition. While the former promises greater accuracy, the latter is included free as part of the Accessibility Features of any recent Windows operating system. (Note that there is a version of Dragon for Mac, but I have no experience with it and can thus not give my recommendation.)
There are actually three different versions of Dragon 13 available: Home, Premium, and Professional. For a comparison of the three different versions, you can see this PDF from Nuance. At nearly $500, Dragon Professional has the most advanced features, including the ability to write complex macros and commands. However, thanks to the free third-party software, Vocola — which I will show you how to use in a future post — you can get away with a copy of Premium, possibly Home (which I have not tried — YMMV).