I love World Creator, especially the vegetation distribution pipeline. You can create some very realistic fields with it. Im going to check out impostors too - ive seen it a few times and wondered what it's about.
Stupid Rental. My Zbrush that I haven't paid for an update in years and is perpetual Trumps that on all counts.
Duality: Animation and Game Creation
This video describes the new features of the Duality game engine, such as more fluid animation. It also shows how to quickly create a platformer game from scratch.
© Adam’s Lair, 2015, https://www.youtube.com/channel/UC1Hta8oxjiOCWJnFBgV9BAQ