Hephaestus is a computational framework to be used for iterative solution programs, such as weather models or CFD applications. (Now in need of an administrator/developers).
Golp is an easy-to-use property class library for CFD&NHT programs. Golp is not, but more than a property database, it provides thermodynamics and thermophysical properties by generic interfaces. The classes can also be built as COM and python modules.