The Release Candidate of GeoGebra 4.2 is now available. Several of its new features are explained by Balazs Koren in the official GeoGebra blog. I have also written a Sneak Peek on its new features. The Sneak Peek includes the following topics:
GeoGebra 4.2 will be released in December 1. If you want to learn about this amazing software, you may want to check my GeoGebra Tutorial Series, a collection of more than 50 tutorials from beginner to advanced.