WAVELET, a C++ code which contains some utilities for computations involving wavelets.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
WAVELET is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
HAAR, a C++ library which computes the Haar transform of data.
SFTPACK, a C++ library which implements the "slow" Fourier transform, intended as a teaching tool and comparison with the fast Fourier transform.
SINE_TRANSFORM, a C++ library which demonstrates some simple properties of the discrete sine transform.
WALSH, a C++ library which implements versions of the Walsh and Haar transforms.