This page contains most of the resources that I use and recommend.

Modeling Resources

These tools enhance productivity in modeling.

Convexity

Convexity is one of my favorite plugins. If you take any time browsing the Wall Worm site, you'll see mention of Convexity quite a bit. It has a giant set of game-related design tools that make level design much easier. It is also a required plugin if you want to use the Quick Hull and Advanced Hull tools in WWMT. I have already written a short review of Convexity here.

Power Nurbs

Power Nurbs is also one of my favorite plugins. It gives you really cool design tools and a more natural way of modeling organic architecture with a boolean process using Nurbs. The internal Nurbs tools in Max, sadly, suck. With Power Nurbs, you can actually use Nurbs in Max easily. Furthermore, it adds Power Sketch, which allows you to create spline shapes with options (like inference and curve styles) that become indepsensable once you learn about them.

Marius Silaghi's Scripts

Marius Silaghi has several extremely useful scripts for modeling in Max. I have and use Smooth Edges, Subdivision Reversion and Quad Connect.

Ant Stitcher

Ant Stitcher allows you to sew the edges of different polys, even if they don't share the number of edges/vertices to be sewn. Very handy.

Itoo's Glue

Glue (not to be confused with the Glu Fluid System) allows you place objects onto the surface of another object. While there are already ways to do this inside Max, it allows you to do it conveniently; I use it mainly to make a spline conform to the shape of another object's surface since it has better performance than space warps like Conform. It's also free.

　

Productivity

Miauu's Work Plane

Miauu's Work Plane is one of my favorite new utilities. I cannot imagine living without it anymore, especially for level design. It allows you to easily create grids based off of object elements; the grids can rotate on their major axis lines based on the viewport angle. It's a commercial script, but very inexpensive. You'll find it well worth your money.

Zookeeper

Zookeeper is probably one of the most powerful productivity tools I own. If you haven't gotten used to it, it's really hard to understand exactly why you'd want it; it gives you entirely new ways of managing scenes. I highly recommend this program.

Outliner

Before I used Zookeeper I was using Outliner, a very simple but powerful scene management tool. It costs a lot less than Zookeeper and it does have the ability to add nested layers (which was the main reason I bought it). I don't use it anymore since I have (and prefer) Zookeeper. If you don't want to pay for Zookeper, though, you should really look into Outliner.