DMC Corona UI is an advanced widget library for Corona and contains Widgets, Styles and Controls.
Many of the Widgets wrap other OpenGL or platform-native objects to make them behave more consistently. All of the components are style/theme-aware.
widgets
A Date Picker Wheel widget that actually adjusts for the different number of days in each months, and even accounts for leap years!
Modified version of Corona SlideView.
You can add your external listener (callback) and add any display objects.
Sample code demonstrating extending the widget framework to create a panel. See: http://coronalabs.com/blog/2014/04/08/widgets-creating-a-sliding-panel/ for a tutorial on this project.