Here's a trailer for XrayCat ST 1.5 for 3ds Max.
Digital Frontier's Alembic for 3ds Max
Digital Frontier add interoperability for Maya and 3ds Max with their free plug-in for exporting in Alembic format.
Forest Pack for 3ds Max
iToosoft have launched Forest Pack, a 3ds Max plug-in for the creation of vast surfaces of trees and plants.
Freelancer artist John Martini has released Welder 1.0, a script for 3ds Max that creates welds between intersecting geometry.