8Stream is an unofficial Twitch.tv client for Windows Phone. You can watch all streams in any qualities without limitations.

=== App functionalities ===
+ [BETA] Real push notifications
+ Pin your favorites channels on your startscreen
+ Watch streams in any qualities (if available)
+ All games
+ Featured streams
+ Login to twitch.tv
+ Followed streams
+ Followed channels
+ Chat support
+ Search games, channels and streams
+ Follow and unfollow channels

8Stream is not affilied to Twitch.tv in any way. The app is made by fans who love Twitch but want a native app.