The LightWave Assets / Plugins database maintains a list of free and commercial third-party plugins available for LightWave.
Generate cellular based procedurals
Create a mesh from a DEM file
Loads a variety of different DEMs as gray scale images
Level of detail object replacement, driven by a text file
Create and apply normal maps
Refine a mesh, removing unneeded polygons
Builds an optimized landscape from an image or procedural