You could have downloaded DiceBag X 1.0 for Mac from our software library for free. The software is included in Games.
From the developer:
DiceBag is a graphical based die roller with many features including: Eight types of die (2,4,6,8,10,12,20,100) Multi-Die Roll Totals Total Modifiers Individual Roll Modifiers Multiply Totals Die Saving Personal Dice Bag Three Dice Styles and Sizes User Customizable Dice Styles
You may want to check out more Mac applications, such as World of Warcraft Interface AddOn Kit or Virtual Combat Cards, which might be related to DiceBag X.