See the improvement offered by the new Voronoi modifier, versus the old Fragmenter, in the new update for RayFire.
Motiva Exposure Control for V-Ray
Motiva have released a free plugin for 3ds Max that serves as an extension over V-Ray's native Exposure Control.
Map Transfer is a free 3ds Max and Thinknig Particles tool that converts color information into a transformation.
RailClone is a 3ds Max plug-in for parametric modeling based on custom geometry and a set of construction rules.