CoolProp is a thermophysical property database and wrappers for a selection of programming environments. It offers similar functionality to REFPROP, but CoolProp is open-source and free. This is only the download location, please visit the `GitHub project `_ to get support and to browse the source code. The documentation is hosted at `coolprop.sourceforge.net `_. You may find answers to some frequently asked questions at the `project's FAQ `_. There is nothing more to see here, get your `binaries `_ from this directory or browse the source code in the `GitHub project `_.