1)   XYit 3.1
With XYit you can digitize xy co-ordinates of points & lines in images, enabling you to capture their original x-y values. And you can do the reverse, plotting xy numerical data back onto an image, ideal for making maps of proposed routes etc.

 2)   AD-Converter 2.15
This program is actually an analog-to-digital converter. It is intended to digitise the signal coming from the soundboard. There are two modes of operation: (i) input-signal (oscillograph) mode and (ii) spectrometer mode.