I like the fact that the main content on the page never disappears, although the interacting with the side bar is at an all time high. It's a very clean layout with flat ui colors that speaks nicely to the flow of the app.
A simple messages experiment. The main goal was to display messages not as list but something totally different. This came out after playing around with it :)
Some other interactions for my upcoming Chat App project. Behance Twitter Facebook
Music player | http://uidesigninspirations.blogspot.com