I doubt there are many people making such software since you can already calculate sight adjustments in about 30 seconds with a 4 function calculator.
You just compare the distance you are shooting at, with the sight radius of the gun. OK, so let's say you are shooting at 7 yards and the distance between the front & rear sights on your gun is six inches. You sight radius is exactly 1/42nd of the distance (7 yards) you are shooting at. OK, so your groups are 3 inches to one side? Divide 3 inches by 42 (which is .071") and move the rear sight to one side by that amount.
Money saved on software, now diverted to a beer purchase.