OpticStudio 15.5 was free to download from our software library. The actual developer of the software is Zemax LLC. The software belongs to Photo & Graphics Tools.
From the developer:
OpticStudio is an optical and illumination design software tool. Design almost any optical or illumination system with OpticStudio, including:projection, binocular, binocular and freeform lenses; LEDs, backlight, display and solar systems; biomedical optical imaging systems; coherent laser and fiber optic systems and more.
You may want to check out more software, such as ShipRush for Endicia, Exercise Drawer or AccuStudio nXt Materials, which might be similar to OpticStudio.