Here's a trailer for XrayCat ST 1.5 for 3ds Max.
Realistic Grass in 3ds Max with V-Ray - Tutorial
Michal Horba from Evermotion explains how to create grass using the V-ray displace modifier in 3ds Max.
Map Transfer is a free 3ds Max and Thinknig Particles tool that converts color information into a transformation.
Demolition Master is a 3ds Max tool based on Thinknig Particles for the creation of all kinds of destruction.