iRoller for Android - allows to simulate the roll of standard d20 dice (dice with 4, 6, 8, 10, 12, 20 and 100 faces), to calculate custom dice rolls (e.g. 3d6, 5d8, but also 1d7, 4d9, etc.), to simulate a coin toss (Tail, Head), and to simulate the dice from the board game Formula Dé (Formula D)
