RADEX
Non-LTE molecular radiative transfer in an isothermal homogeneous medium
This program is free to use for everybody, provided that publications make a reference to our papers: Van der Tak, F.F.S., Black, J.H., Schöier, F.L., Jansen, D.J., van Dishoeck, E.F., 2007, A&A 468, 627-635; Dwiriyanti, C., Van der Tak, F.F.S., de Plaa, J., 2024, A&A,submitted.