CamBam, available here www.cambam.co.uk . I always recommend this software as I find it unbeatable for the money. It is very powerful with both 2.5d and 3d capability. Nice steady updates and enhancements by Andy, keep it on top for me - and very bug light (can't think of any at the moment). There is also a Mach3/CamBam package for purchase at the website. A good read on the forum will answer many questions - there is a fair amount of documentation there too, along with some videos.