First totally open-source and computationally-efficient thermodynamic library! Great work!
A very clean interface to thermodynamic properties on many fluids.
A very nice piece of software, I started using it for humid air calculations. I do especially like the fact that it has water properties below the Triple point. It is quite well structured, the syntax is similar to the Matlab syntax for refprop. For me it worked on my XP Laptop without problem. I have done some random tests against Antoine and Magnus equations for Steam and some polynomial approximations for air and steam. It looks promising.