Desktop Dicetray

Desktop Dicetray is a digital dicetray overlay for your windows desktop containing a D4, D6, D8, D10, D12, D20 and a percentile dice. With customizable dice and fonts, a couple of dice trails, a roll calculator and a dice bin to destroy the worst dice offenders, Desktop Dicetray has all your dice needs.

For more details :
https://www.themattempire.com/digitaldicetray

Windows only (sorry Mac/linux users!)