I thought I would start a thread so people can share their favorite Max scripts and plugins. This idea came about as I recently found a plugin that I wish I had seen years ago called Populate: Terrain. It converts a contour mesh into a quad mesh, which makes it sooooo much easier to manipulate. There's a couple others I use as well, but I always forget to look and see about any new ones that may have come out.
So, what's your fav?