I found the AGS calculator plugin lying around just now, so I've decided to host it (and some of the other plugins) because I see that the website for it is frozen due to bandwidth problems.
Here's the URLs:
AGS Calculator Plugin: http://herculeaneffort.adventuredevelopers.com/plugins/agscalc161.zip (http://herculeaneffort.adventuredevelopers.com/plugins/agscalc161.zip)
AGS File Plugin: http://herculeaneffort.adventuredevelopers.com/plugins/agsfile10.zip (http://herculeaneffort.adventuredevelopers.com/plugins/agsfile10.zip)
AGS Scaling Plugin: http://herculeaneffort.adventuredevelopers.com/plugins/agsscaling10.zip (http://herculeaneffort.adventuredevelopers.com/plugins/agsscaling10.zip)
Hope this helps!