FiPy is an object oriented, partial differential equation (PDE) solver, written in Python , based on a standard finite volume approach. The framework has been developed in the Metallurgy Division and Center for Theoretical and Computational Materials Science (CTCMS), in the Materials Science and Engineering Laboratory (MSEL) at the National Institute of Standards and Technology (NIST).

FiPy's home is at http://www.ctcms.nist.gov/fipy