Cuneyt Sen shared a really cool project on Behance for an app design presentation as well as brand identity for Bonarego, a tourist guide application with video & audio targeting today's independent travelers. The reason I like this project is of course interface design but also the way it is shows the features. From the UI point of view there are a few nice touches. I love the organic element it was created and how it is used on certain elements of the UI, like the avatar for example. I also know that there are several issues with this design, one being accessibility with the very low color contrast.
For more information make sure to check out http://www.cuneytsen.com/