Authors of FFTW (reachable at fftw@fftw.org):

Matteo Frigo <athena@fftw.org>
Stevenj G. Johnson <stevenj@alum.mit.edu>

Stefan Kral <skral@fftw.org> wrote genfft-k7/*.ml*, which was
added in fftw-3.0 and removed in fftw-3.2.

Support for the Cell Broadband Engine was graciously donated by the
IBM Austin Research Lab, which was added in fftw-3.2 and removed in
fftw-3.3.

Support for MIPS64 paired-single SIMD instructions was graciously
donated by CodeSourcery, Inc.