Dinner - transitions/animation - flat design w/ dimension -
Kettly iPhone app concept by Jakub Antalik
Cloud button with nice progress indication
Nice unique UI with subtle details, that make it very attractive.
Timeline View Able to toggle from timeline/gallery view. Filter your feed and browse on top. Setting options when hover over your avatar.
Timeline Graphics for Web, Mobile, and Print Design / Design Tickle
25 Gorgeous Examples Of Timeline In Mobile Apps UI Design - Smashfreakz