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