Hello,
D100sim is an executable for windows, made with HTML executable (GDG software). It is essentially a webpage wrapped in a executable.
It's purpose is to simulate rolling a d100 with 2d10s. (If this didn't make sense, you need to take Polyhedral dice 101...)
Simply click the button with the R on it to begin rolling. Click it again to stop.
Have Fun,
The Pulp guys.
Pulpnet Site