I'm not talking about the RTD mod.
Basically, with this mod, you can say /flipcoin or /rolldie (number)
/flipcoin flips a coin, and displays the result to everyone in the server.
/rolldie (number) rolls a die with the same number of sides as the number you set, so /rolldie 6 would roll a six sided die. The result is displayed to everyone in the server.
This is useful for general deciding, or for fair mini empires.