lita-dice is a handler for Lita that allows you to roll virtual dice.
Add lita-dice to your Lita instance's Gemfile:
gem "lita-dice"To roll the dice:
[You] Lita: roll
[Lita] User rolled 5
[You] Lita: roll 2
[Lita] User rolled 3 4 (7)
[You] Lita: roll d100
[Lita] User rolled 42
[You] Lita: roll 3d20
[Lita] User rolled 13 1 15 (29)