The Regional Climate Model system RegCM is flexible, portable and easy to use. It can be applied to any region of the World, with grid spacing of up to about 10 km (hydrostatic limit), and for a wide range of studies, from process studies to paleoclimate and future climate simulation.  The latest version of the model, RegCM4, is installed as a module and includes major upgrades in the structure of the code and its pre- and post- processors, along with the inclusion of some new physics parameterizations.

GNU General Public License (GPL)
website RegCM
help docs, user guidedeveloper guide,