From LightWiki

Layout

• Backdrop - Plugins which affect the background
• Camera - New camera types
• Channel - These affect channels/envelopes
• Custom Object - Mesh plugins which can do a variety of things
• Deformation - For deforming a mesh in Layout
• Generic - Plugins which have immediate effect
• Hair - For the creation/rendering of hair
• Image Filter - Plugins for affecting images
• Master - Plugins which control a scene
• Motion/Dynamics - For changing an item's motion
• Nodal - Plugins for LW's node system
• Object Replacement - Replacing a mesh
• Pixel Filter - Post process plugins
• Shader\Texture - pre nodes methods of affecting surfaces
• Volumetric - volumetric effects

Modeler

• Create - Plugins which make new primitives
• Construct - These take an existing selection, and build something else from it
• Modify - These move points/edges/polys around
• Remove - Tools for reducing point/polygon/edge counts
• Skelegons - Tools for editing skelegons
• Subdivide - These cut an object up in some manner
• Vmaps - Plugins for manipulating Polygon/Edge/Point maps like UVs, Parts etc

External