3ds Max | All

With miauu's Select by visibilit you can:

Spline FFD is a tool that allows you to move multiple vertices at once, moving the points of a spline.

New 1.1: Added mode that preserves the original distance between vertex.

With Spline FFD you can select a number of points on a mesh and creates a spline that passes through these points. By moving the points of the spline, the original mesh vertices move properly.

Description:  Simple yet incredibly powerful script designed to weld overlapping edges together.

Edge Loop Straighten with Constraints works like this:
Selected one or more partial loop(s) of edges, run the script, and it will straighten all the verts between the end verts of the loop(s). What makes this script different from others of its kind is that it fully supports all three geometry constraint modes; edge, face, and normal constraints.