The CAD productivity tools have been separated into four sections. The tools have been created with either AutoLisp or VBA, where the Lisp based tools should work on most versions of AutoCAD, but the VBA tools will only work with R14 or greater.
Most of the files available from this site are freely downloadable for your personal use. Whilst each of the tools and shortcuts are useful in their own right, the Productivity Tools section contains custom software which takes a step beyond the basic "macro" style of productivity booster. Due to the complexity and perceived marketable value of these products, some of the tools are only available by ordering (for a nominal fee).