Hopefully these are mature enough to be generally useful. I would appreciate any comments regarding the interface. The FFTW API is not particularly nice for building a pure interface on. Some of the transforms could be made slightly faster at the expense of a much nastier interface, but unless someone needs the extra few percent, or is pushing the memory limits on their machine, I'm not inclined to expose the underlying nastiness. * carray A C-compatible array library. Provides both an immutable and mutable (in the IO monad) interface. Includes utilities for multi-dimensional arrays, slicing and norms. Memory is 16-byte aligned by default to enable use of SIMD instructions. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/carray * fft Bindings to the FFTW library. Provides high performance discrete fourier transforms in arbitrary dimensions. Include transforms of complex data, real data, and real to real transforms. http://hackage.haskell.org/cgi-bin/hackage-scripts/package/fft Jed