I think you are impressed by the consistent color theme of the app. It looks like its designers have carefully redefined the default Android widget design with their own custom layout.
There is no plugin for development tools to help you achieve this; however, there are many external tools.
Here is a tool for creating styles for the action bar (navigation bar at the top): http://jgilfelt.imtqy.com/android-actionbarstylegenerator
Tool for creating custom Holo color widgets: (Holo - Theme on modern Android platforms): http://android-holo-colors.com/
And my favorite Resource # 1 for this type of setup is this site: http://www.stylingandroid.com/
These three are more than enough to set up an interface similar to the one you linked above. Good luck
source share