There is a new way to access and learn some of the great new features in Photoshop CC. The Photoshop CC Features Panel is available exclusively from Adobe Exchange for Creative Cloud subscribers.
Further details are in this blog post http://blogs.adobe.com/cssdk/2013/10/photoshop-cc-features-panel-now-available.html
Also on Adobe Exchange from Adobe:
LevelUp – Learning Photoshop is just a game!
Dreamweaver Server Behaviours and Database – Get the functionality from CS6 and earlier back in CC.
Speech Models for Premiere Pro and Prelude CC – Lots of different languages for speech to text workflows