See the Unreal 4 engine in action in this trailer for Primal Carnage Genesis.
Substance in Unreal Engine 4 Tutorial Series
Allegorithmic have created a tutorial series that covers how to use Substance with Unreal Engine 4.
Real-time Global Illumination with Enlighten and UE4
Epic Games and Geomerics created the video to highlight the latest physically-based lighting techniques in games.
Houdini Engine for Autodesk Maya
SideFX have released Houdini Engine for Maya, with 3ds Max and Unreal versions coming soon.