ViewPagerIndicator is a set of Android Paging indicator widgets compatible with the ViewPager from the Android Support Library and ActionBarSherlock.
When using the ViewPager widget to allow horizontal swiping, it is not always obvious to the user that there are adjacent views they can navigate to.
ViewPagerIndicator allows you to provide a visible onscreen indicator that there exists additional content.
Check out http://viewpagerindicator.com/ for more details.