EffectWare have recompiled a large number of their plugins for Max 6. You can find the plugins here.

Changes for v1.0 beta1 are:
- Fixed horn parameter inheritance problem
- Separator implemented

Changes for v1.1.38 beta are:
- Settle liquid function fixed
- Creation with button repaired
- It's now possible to launch mesh surface calculation while dynamic solver is working
- Repair surface function fixed
- Source placement is fixed
- Filling objects fixed in Max 6

Changes for v1.7 are:
- Exporter now supports 'Export selected'
- Max 6 support

Changes for v1.01 are:
- Fixed Max shut down when [Create Line]

Changes for v2.61 are:
- Fixed problem with extra edges / vertices being created in Max 6. The 3 edge removal options in advanced settings now work correctly.
- Fixed a crash when in modifier mode and you undo the PwrBoolean creation.

Power Booleans is available for Max 4 to 6, and costs $195. A demo version is available here.

Changes for v5.12 are:
- Adds support for Max 6

Polygon Cruncher is available for Max 3 to 6. It normally costs $109, but Mootools are running an offer until the end of the year for $87.

This snap plugin implements shape object 2D-intersection snap ('ShapeIntersectXY'). This has a few restrictions:
- Snap evaluates lines projected on local XY plane of shape object
- The accuracy of snap point depends on [Interpolation] option of shape object
- You can't snap intersection across the another shape object.

3D Aliens have started the open beta testing of their upcoming fluid simulation plugin glu3D.

glu3D is a complete plugin system that makes it easy to animate liquids in Max. Its main features are:
- Particle based dynamic engine that automatically animates liquids that interact with surrounding geometry
- Triangle mesh surface sequence is generated to visualize liquid surface
- Fully integrated in Max environment in order to simplify production workflow
- File cache system to store pre-calculated dynamics results
- Crowd object. A sample object is instanced at every particle position
- Motion blur
- Wet maps
- Texture mapping
- Arbitrary planar shapes as sources
- Fill objects function to speed up scene initial condition setup
- Friendly customizable UI full of shortcuts, menus and toolbar buttons

To start beta testing the plugin, head over to the glu3D download page.

Changes for v3.6 are:
- Max 6 support
- Shadows from Cumulonimbus type of clouds
- Distribution of Cumulonimbus in Areas along skeletons
- Moon object as a new Compound Sky Layer
- Some bugs fixed

Advanced Rendering Technologies have updated their RenderPipe MAX plugin for Max 6.

REYES Infográfica have recompiled all of their plugins for Max 6.

Peter Watje has recompiled a load more plugins for Max 6:

Particle Control v1.02
See Buffer, GAlpha and CAlpha v1.0
Cylindrical Gravity, Planar Gravity, Spherical Gravity and Spiral Gravity v1.0

Changes for v1.0 alpha2 are:
- Fixed a bug that crashed the plugin with certain hierarchy setups
- Orientation Tropism is now imported
- Switch is up and running again

Paralelo Computação have updated all of their Fly3D import and export plugins to work with Release 2.08 of their Fly3D game engine. The SDK also now includes plugins for Max 6.

Math Controller allows you to take another float controller as input and apply some basic math to it, like add, substract, multiply etc.

Peter Watje has recompiled two more plugins for Max 6:

Particle Displace v1.1
Particle Gravity v1.0

Changes for v2.52 are:
- No changes, this is just the version for Max 6

Changes for v2.12 beta are:
- Support for Max 6

Changes for v5.6 are:
- Support for Max 6

Tree Storm is available for Max 4 to 6, and normally costs $695. For a limited time you can get Tree Storm 5.6 free of charge when you order OnyxTREE Max SuperBundle containing OnyxTREE PROFESSIONAL Suite 6 + TREE STORM 5.6. SPECIAL OFFER price only $495, a saving of $200.

Changes for v1.0 are:
- Support for Max 6
- Now handles premultiplied textures better
- Very memory efficient and fast (Max 6 plugin)

The link above is for the Max 6 version, if you are still running Max 4 or 5, you need this version.

Changes for v2.60 are:
- Fixed problem with transformations being applied to curves which are then used to create solids
- Demo only version with loading, modifiers and mesh conversion removed
- New Installer from InstallShield

PowerBooleans is available for Max 4to 6, and costs $195. A demo version is available here.

Peter Watje has recompiled a few more plugins for Max 6:

Lag v1.1
Linked XForm+ v0.5
Mask Modifier v1.2b

Mankua have announced that PowerStamper v1.0 for Max 6 is now available. To request your update, please send them an email with your info and serial number to: erika@mankua.com.

Changes for v1.2.1 are:
- This is a straight recompile for Max 6

Dieter Morgenroth has started recompiling his plugins for Max 6. The first ones available are:

MultisubMap v1.0
Optimize Spline v1.0
TileMagic v1.0

Changes for v1.2.18 are:
- Support for Max 6
- Various bug-fixes

Egerter Software has made Max 6 versions of the mesh and character exporters for their Power Render 3D engine available to registered users.