AGI32 Light analysis tool (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 a rendering engine and let you evaluate light on surfaces with many tools such as isolux curves.
LIGHTSTANZA Software for the calculation of electrical and natural light that easily integrates with BiM software.