The Framework for 0-D Atmospheric Modeling (F0AM) is a MATLAB program for simulating atmospheric chemistry systems. It is user-friendly and adaptable to a variety of typical applications, including:
F0AM is open-source and freely available for download on github.
Regular users are encouraged to enlist in the F0AM users group, a combo email list and Q/A forum.
Also, here is a list of publications using F0AM.
Happy modeling!