You can use this site to watch any number of twitch.tv streams at the same time (as long as your computer can handle it).
You can use [MultiTwitch](http://www.multitwitch.tv) to watch any number of [Twitch](https://www.twitch.tv) streams at the same time (as long as your computer can handle it).
Simply put the streams you want in the url.
MultiTwitch will optimize the layout of streams to give you the maximum size on each of the streams,
[MultiTwitch](http://www.multitwitch.tv) will optimize the layout of streams to give you the maximum size on each of the streams,
while maintaining aspect ratio.
For the curious, the source of this page is available at github.com/bhamrick/multitwitch