Previously known as OpenFOAM-dev and OpenFOAM-extend, the foam-extend project is a fork of the OpenFOAM open source library for Computational Fluid Dynamics (CFD).
It contains bug fixes and performance improvements, as well as extensions and additional features provided by community contributors such as dynamic mesh and topological change support, turbomachinery extensions including general grid interpolation (GGI), cyclic GGI and mixing plane, block-coupled matrix support, implicitly coupled conjugate heat transfer and other physics coupling, finite area method, comprehensive dynamic mesh (motion and topological changes) capability and GPU support.