This is the Dengo package, designed to be a meta-solver for chemical reaction networks and cooling processes. The purpose of this is to provide a simple and maintainable way of defining microphysical solvers for updating the chemical and thermodynamic state of fluids in astrophysical simulations. It has been designed to output a C solver which can call external solver libraries, as well as affiliated reaction rate tables. For more information, please contact the authors: Matthew Turk (matthew.turk@gmail.com) Devin Silvia (devin.silvia@gmail.com) Dependencies: CHIANTI -- Atomic Database for astrophysical spectroscopy - Download from http://www.chiantidatabase.org/download/CHIANTI_7.1_data.tar.gz - Place in unique directory before untarring (it doesn't have a containment folder) - Need to set special environment variable, XUVTOP (example: 'setenv XUVTOP /path/to/CHIANTI' ) ChiantiPy -- ChiantiPy is the Python interface to the CHIANTI atomic database - Download from http://sourceforge.net/projects/chiantipy/ - run 'python setup.py install' in ChiantiPy directory