ColorPy is a Python package to handle physical descriptions of light spectra. It can make nice plots of these spectra, and determine the RGB color that the spectrum represents. ColorPy is free software, and is licensed under the GNU Lesser GPL. See the example plot, created with ColorPy, below.
Get more information, and download, ColorPy here.. ColorPy
AtomicSpectra is a Windows program that displays the line spectra of all the elements. (Most of them, anyways.)
Get more information, and download, AtomicSpectra here.. AtomicSpectra
Contact and other information about me is here.. About Me
You can contact me by email at: firstname.lastname@example.org