Found out about a couple of interesting libraries for through some postings on the iPhone and iPad development forum.
The first is MTStatusBarOverlay which allows you to easily customize what’s shown on the status bar and allows you to display custom notifications in a similar fashion to the Reeder, Evernote, and Google Mobile apps. The second is MTLocateMeBarButtonItem, a custom BarButton that behaves just like the locate button in the Google Maps app changing it’s look depending on the current status.
Here’s a screenshot showing MTStatusBarOverlay:
You can find MTStatusBarOverlay on Github here:
You can check out these pages to get a better understanding of how the status bar was modified in the answer to this Stack Overflow question:
You can find the MTLocateMeBarButtonItem here:
Read More: Open Source iOS Libraries And Tools