EMSL Gaussian Basis Sets
Developed by the Pacific Northwest Laboratory. Shows databases of computational chemistry environment basis.
Records kinetic rate constants and parameters for reactions.
JPL Molecular Spectroscopy
Database collection of programs relating to the fitting of spectra and spectral line files for a large number of molecules.
NIST Physical Reference Data
Pools in information relating to fundamental physical constants, atomic spectra; and data involving X-Ray and Gamma-Rays, ionization, radiation, and nuclear physics.