This repository contains samples for Xamarin.Forms that were written by Charles Petzold but which are not in https://github.com/xamarin/xamarin-forms-samples, or in Creating Mobile Apps with Xamarin.Forms usually because they demonstrate unorthodox techniques, or because they don't work very well, or because they push the outside of the envelope to the point where it breaks.
As of August 12, 2015, all samples have been updated to Xamarin.Forms 1.4.4.6392.
The RotatingSpokes sample has been removed because it's included in Chapter 22 of Creating Mobile Apps with Xamarin.Forms.
The PageFlipper sample has also been removed because the technique is illustrated in the SwingingEntrance sample in Chapter 22 of Creating Mobile Apps with Xamarin.Forms.
Which means that the only project left is KwazyThreeDee.