Netlib

Repository of mathematical software in source code form, mostly in Fortran, though there is some in Matlab, C and other languages. Directories include Lapack (linear algebra, eigenvalues, and SVD), toms (Trans. on Math. Software), numeralgo (Numerical Algorithms), and 'PACKS such as MINPACK (minimization), QUADPACK (quadrature, integration), FFTPACK (Fast Fourier Transform), ODEPACK, and ODRPACK.