Tessa is a three-dimensional simulation software for optical systems, based on the FDTD method. It is believed to be terribly efficient.

Tessa was developed in the LEOM laboratory, École centrale de Lyon: http://leom.ec-lyon.fr/

• Development Status: 4 - Beta
• Environment: Console (Text Based)
• Intended Audience: Other Audience
• License: GNU General Public License (GPL)
• Operating System: OS Independent, POSIX
• Programming Language: C, Python
• Topic: Scientific/Engineering