AGI32 Light analysis tool, for the evaluation of light (natural and artificial) in 3D models.
ASAP Raytracing software for the evaluation of optics design in light product development.
CHAOS GROUP V-RAY V-Ray render engine implement many useful tools for lighting calculation and for the evaluation of the project from a Lighting Designer point of view.
DIALUX Free software that let you install plug-ins directly from luminaries manufacturers. Pov Ray is used as rendering engine and let you evaluate light on surfaces with many tools such as isolux curves.