Riot 0.9.5 for Mac can be downloaded from our website for free. Riot for Mac lies within Communication Tools, more precisely Texting & Video calls. This free Mac application is an intellectual property of Vector Creations Ltd.
From the developer:
Riot is a shared workspace for the Web.
You may want to check out more software for Mac, such as League of Legends, Doomed Heretic or Hammer, which might be similar to Riot.