Similar packages or softwares you could be interested in (please
reference your own if not there!) :

-   [specutil](https://github.com/astropy/specutils): a Python package
    for spectral analysis in astronomy
-   [pyspeckit](https://github.com/pyspeckit/pyspeckit): a python
    spectroscopic toolkit
-   [rampy](https://github.com/charlesll/rampy): a Python package for
    spectral data processing (IR, Raman, XAS\...)
-   [scikit-spectra](https://github.com/hugadams/scikit-spectra): Python
    pandas-based toolkit for explorative spectroscopy, in particular
    UVVis spectroscopic data.
-   [WrightTools](https://joss.theoj.org/papers/a82637112ac3e03df961d4494bc927d4):
    a Python package for multidimensional spectroscopy
-   [spectools](https://pyhdust.readthedocs.io/en/latest/spectools.html#module-pyhdust.spectools):
    Python tools of the BeACoN group
-   [SpectroscoPyx](https://github.com/PlasmaPy/SpectroscoPyx): a Python
    package for spectroscopy
-   [Spectragryph](https://www.effemm2.de/spectragryph/index.html):
    software for FTIR / organic spectroscopy

Lab plasmas:

-   [SPECAIR](http://www.specair-radiation.net/): calculation and
    fitting of UV/VIS plasma emission

Astrophysical plasmas:

-   [ChiantiPy](https://github.com/chianti-atomic/ChiantiPy): python
    package to calculate the radiative properties of astrophysical
    plasmas based on the CHIANTI atomic database
-   [Sunpy and
    radiospectra](https://docs.sunpy.org/projects/radiospectra/en/latest/index.html):
    Python package for solar data analysis

Atmospheric studies:

-   [HAPI](https://github.com/hitranonline/hapi): HITRAN Application
    Programming Interface
-   [Py4CAtS](https://atmos.eoc.dlr.de/tools/Py4CAtS/): Python for
    Computational ATmospheric Spectroscopy (HITRAN, Geisa)
-   [GARLIC](https://www.sciencedirect.com/science/article/pii/S0022407313004731?via%3Dihub):
    Fortran line by line code
-   [MODTRAN](http://modtran.spectral.com/): MODerate resolution
    atmospheric TRANsmission
-   [LBLRTM](http://rtweb.aer.com/lblrtm_code.html): Line-by-line
    calculations of atmospheric fluxes and cooling rates
-   [libRadtran](http://www.libradtran.org/doku.php): C and Fortran
    functions and programs for calculation of solar and thermal
    radiation in the Earth\'s atmosphere

And in general the list of [GitHub spectroscopy related
packages](https://github.com/topics/spectroscopy)