New RPG Dice calculator application from FlyingDogHouse, it uses a calculator style interface to create, roll and save dice for your game.
Basically you enter a formula like this [3d6]+3+[2d10]-1 and it will roll it out for you.
http://www.windowsphoneapplist.com/rpg_dice_calculator-a31957.html
Oh and to insure it is as random as possible the app uses the cryptographic random functions from Microsoft.
thanks and happy gaming!