Check out the showreel for RayFire, a plugin for 3ds Max.
Making Gravel with MultiScatter
Alexey Duk has posted a tutorial on how to create gravel with VrayPattern and MultiScatter in 3ds Max.
3ds Max Particle Flow Tutorial - Barn Tornado
Pete Draper has made an 11-part tutorial on creating a tornado using Particle Flow in 3ds Max.
ThinkingParticles 5 - Review
Find out how fares ThinkingParticles 5, Cebas' particle plugin for 3ds Max in this in-depth review.