Autocad lo fa sicuramente.. certo che non è semplice e tantomeno economico come sistema, però questa funzione dovrebbe essere compresa in più di un programma di grafica.
Uno a caso, GIMP:
http://docs.gimp.org/en/gimp-tool-measure.html
Quote:
The Measure Tool is used to gain knowledge about pixel distances in your working image. By clicking and holding the mouse button, you can determine the angle and number of pixels between the point of click and where the mouse pointer is located. The information is displayed on the status bar or can also be displayed in the Info Window.
When you pass the mouse pointer over the end point it turns to a move pointer. Then if you click you can resume the measure.
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