Dimension is a work-in-progress integrations manager for Riot. What Dimension allows you to do is manage the various bots and bridges for your room, much like the default manager in Riot, but in a free and open source way. Currently t2bot.io has a version of Riot that uses Dimension running at t2bot.io/riot. Simply log in and click the integrations button to give it a spin.
To learn more about Dimension, or to contribute, please see turt2live/matrix-dimension on Github.