FFT Algorithms

First, there are two classic references that should be mentioned:

FFTW

On a linux system, you have access to some very nice and well proven FFT routines coded in C:

FFTW is easily installed on a fedora system, just do:

yum install fftw
yum install fftw-devel
As of 5-2010, you will get fftw-3.2.2.

Also available is fftw2-2.1.5. This is the old stable version 2 of FFTW, which has a different API. In addition it offer MPI parallel transforms for those who want this.

FFTPACK

There is also FFTPACK, which is a collection of Fortran FFT routines.
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Adventures in computing / [email protected]