Hitboxes and Bone Properties
The bone tools allow you to give specific bones artbitrary surface properties, set mass bias and create hitboxes and hitbox groups.
Hull Helper
Hull Helper is a simple UI to speed up making hulls from complex models.
Using WWMT
Articles on using the Wall Worm Model Tools.
Getting Started with WWMT
Getting started with using the Wall Worm Model Tools.
Unknown Bitmap Filetypes Crash VMF Exporter
Do not use bitmap filetypes that Max doesn't know how to read.
Using unknown bitmap types on world geometry and displacements will crash the VMF Exporter. This currently happens if using VTFs in materials in 3ds Max 2013 since there is no VTF plugin yet.
Sky Writer
Sky writer allows you to render your 3ds Max scene straight into the Source Game Engine as a HDR 2D sky texture (also known as a cubemap).
Level of Detail (LOD) Generator & Tools Rollout
The Level of Detail Tools Rollout gives you controls for making LOD models and other LOD-related tools.
Displacements
An overview of creating displacements for the Source Game Engine inside 3ds Max using Anvil.
Making your 3D Skybox
Explanation on making a 3D Skybox in 3ds Max with Wall Worm.