Subspline
Spline Dynamics has released SupSpline, a new commercial script for 3DS Max that allows the adds several useful tools for working with splines. For example, you can display spline material IDs and Vertex numbers on screen, manipulate selections using tools familiar from poly editing such as shrink/grow, offset, dot selection, angle selection etc. There are tools for quickly editing materials IDs including the ability to reverse their order or randomise them, or reverse the spline but keep the order of IDs. For a full list of features, see the Spline Dynamics website. The script is currently on sale with a 50% discount for $9.