Spline Combiner & Spline Refiner for 3ds Max

Includes:

Spline Combiner
Spline Combiner is a 3dsMax plugin for simultaneous editing of multiple spline curves, wich lets you perform boolean operations between shapes, cut and break them into parts and control curve intersections.
Combine multiple independent shapes with boolean functions, like in a 2D vector software, using Union, Subtraction or Intersection methods.
Use the Shape Cutter tool to make cookie cuts on shapes and conveniently break them into smaller parts.
Automatically detect intersections between splines and add new vertices or place helpers. Find self intersections in single splines. Break lines at crossing points.

Spline Refiner
Spline Refiner is a 3dsMax productivity tool to fine-tune your spline shapes incredibly fast, in a simple and efficient way.

With this plugin, you can subdivide the splines uniformly, in a human-like manner, adding detail only where it needs to. So, you get a balanced segments distribution without altering the shape of your curves or touching the existing vertices.