After making some search in the forum I didn’t found nothing about this.
http://pixelactive3d.com/Products/CityScape/
The video gives a very good impression of how it works.
It’s a program for city creation, there is a free demo but it lacks of some functions like exporting and limited libraries. I tried the demo (unfortunately only for windows) and it runs very well.
Anyway I found it pretty impressive so I downloaded a demo model they have in the web, it’s in collada format and I imported in Cinema4D R11.
At first it was a complete mess because it includes 3 LOD for each element resulting in several thousands of objects and hundreds of textures (in dds format), but after cleaning I was capable of isolate the lowpoly model and textures. This is not a problem if, as they say, you can export LODs separatedly.
So, this is the result in Unity (a little heavy 4,5 Mb, as I didn’t make optimization and activated realtime shadows).
http://nemdrive.com/Demos/Pixelactive/
One thing I couldn’t find is the price, maybe you need to contact them for that, if anyone get the info, please post it.