Hangouts for gaming: roll (virtual) dice!
In Google Hangouts on desktop type /roll2d6 for two 6-sided dice - you can set how many dice and how many sides (including d20 for your D&D players)
The output shows the total and the face value of each die.
You can access Hangouts at hangouts.google.com
, in Gmail or using the Hangouts Chrome app or Chrome extension.
(via +Sage LaTorra
's comments here: https://plus.google.com/+SageLaTorra/posts/LLAehmqui3w