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 Material Measurement Laboratory ​(MML) at the National Institute of Standards and Technology ​(NIST).

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