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.
Game Developers Conference 2014: AgeCheq
AgeCheq Software Engineer Andrew Smith demonstrates the API his company created and how It can be used for parent control on mobile devices during GDC 2014 event.