Python bindings to the FFTW3 "Fastest Fourier Transform in the West." C-library (http://www.fftw.org/) for computing discrete Fourier transforms. PyFFTW are Python bindings for the FFTW3 C-routines, using numpy and ctypes. It includes a somewhat pythonic interface to the FFTW routines, but leaves the concept of creating plans and executing these plans intact.