This list was established thanks to contributions from participants during the 'Rocks, Dust and Ice' workshop. It is intended as a living community resources.
Optical constants database (Ames): https://ocdb.smce.nasa.gov/
published optical constants code - (Gerakines)
https://zenodo.org/record/4429276#.YVq862ZKhhB
Optical constants from IR codes
https://science.gsfc.nasa.gov/691/cosmicice/constants.html
Optical constants of different type of ices, namely, pure, mixed and energetically processed by cosmic ray analogues in the laboratory. https://sites.google.com/view/astrow-en/research/databases
S. Milam's lab: https://science.gsfc.nasa.gov/691/sublime/index.html
Loeffler's lab: uv - through mid-IR for both rocks and minerals: http://www.astro.nau.edu/~loeffler/
Cosmic Ices Lab (NASA) https://science.gsfc.nasa.gov/691/cosmicice/constants.html
Solid spectroscopy: https://www.sshade.eu
Grundy's lab: https://sites.google.com/lowell.edu/astrophysical-materials-lab
https://www.astro.uni-jena.de/Laboratory/Database/jpdoc/f-dbase.html
http://aram.ess.sunysb.edu/tglotch/optical_constants.html
"Optical Constants of Outer Solar System Materials and Radiative Transfer Modeling," at the astrochem.org web site: https://astrochem.org/docs/RoserDecadal2020.pdf
database of optical constants (compilation): https://www2.mpia-hd.mpg.de/HJPDOC/database.php
light scattering properties of particles, lab measurements: https://www.iaa.csic.es/scattering/
RELAB database (Brown University) http://www.planetary.brown.edu/relab/