MicroSurvey inCAD transforms AutoCAD into a survey and design powerhouse while maintaining a fully integrated user interface within AutoCAD.

AutoCAD on its own is a powerful drafting program. But, Surveyors need tools to help them compute coordinates, balance traverses, annotate drawings, compute areas and the list goes on. Adding inCAD to your existing copy of AutoCAD is like switching from measuring with a chain to measuring with an EDM. After a few months you'll wonder how you ever worked without it!

More info is here.