COGO was developed by an MIT professor in the early '60s and is still
widely used by surveyors and civil engineers. Now about 40 years later
there are so many things that call themselves COGO, it's hard to say what
it is any more.
I am the author of EXCELS COGO and still sell and support it. If you know
it from long ago, you know it's the one you want. If you haven't seen it
in years, you'll be pleased to see that it has improved still more since
you saw it last. It now stores elevations and remarks with its points, it
plots to your screen as well as to plotters, it has new commands for writing
descriptions, stake out, finding points, fitting measured points to
previously computed points, and more.