nitwear Designer from Database Publications, written by Kendall Down.
Here is the jumper I want to re-create. It's an old friend; it fits like a glove and is very comfortable. I added an inch to the body length because I like a longer jumper. Also pictured is my pattern, and the swatch I made, trying out a stitch pattern similar to the one the jumper has, and to find a rough gauge. (When I buy or spin my yarn for the project jumper, I'll adjust needle size to get the gauge that I gave the program.) I'll make a pink jumper, like the one I'm copying. The teal yarn is just what I happened to grab to make the swatch.
I'm not a fast knitter! Once I have the yarn it'll take a while to make the jumper.
 There's a disc in the box, but no manual. I'm pretty sure I found a manual for this software offered online once, but I can't find it now.