FFTW is a C subroutine library for computing the discrete Fourier transform (DFT) in one or more dimensions, of arbitrary input size, and of both real and complex data. It is portable and performs well on a wide variety of platforms.
Mathematics & Statistics
The AMD Core Math Library (ACML) is a set of numerical routines tuned specifically for AMD64 platform processors (including Opteron™ and Athlon™64 ). The routines, which are available via both FORTRAN 77 and C interfaces, include BLAS, LAPACK, FFT, RND, and many others.
High-performance, multithreaded mathematics libraries for linear algebra, fast Fourier transforms, vector math, and more.