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.
Miloš Belanec released the next 5K free texture pack. The third one is all about concrete, wall and ground surfaces.
This time the set comes with a small bonus – three 15K tree textures that can be used for detailed renders.
The artist is preparing another free series in a couple of days, but also a few paid ones, so stay tuned!