The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Alexander Software Development:
Lost your Monopoly dice? Forgot your D&D dice? We can help! Bag of Dice is a dice rolling simulator that lets you roll up to six dice at a time. Set up different "bags" of dice with up to six dice in any combination of 4, 6, 8, 10, 12, 20 and 100 sided dice. Switch between bags with just a couple of taps. Use the included bags, or create your own configurations. You can choose to keep some dice from a roll, and re-roll others. The app will total the dice that you select, and you can choose to discard some from the total. You can tap to roll, or give it a shake. Also included are the rules to Pig, Farkle, and Beetle - easy dice games to play with your kids while waiting for your meal at a restaurant.