Spectroid
Carl Reinke
Vernier Spectral Analysis
Vernier Software & Technology
Dominant λ Light Spectrometer
Contechity
Epson Spectrometer
Seiko Epson Corporation
Spectrometry
PASCO scientific
Room Acoustics Meter
Dr. Johann Gaus
Advanced Spectrum Analyzer PRO
Wojciech Czaplejewicz
Color Meter - RGB HSL CMYK RYB
Scoppy - Oscilloscope
FHDM TECH
Speccy Spectrum Analyzer
Liam ODonnell