I have just uploaded these packages: https://hackage.haskell.org/package/netlib-ffi-0.0 https://hackage.haskell.org/package/netlib-carray-0.0 https://hackage.haskell.org/package/blas-ffi-0.0 https://hackage.haskell.org/package/blas-carray-0.0 https://hackage.haskell.org/package/lapack-ffi-0.0 https://hackage.haskell.org/package/lapack-carray-0.0 https://hackage.haskell.org/package/lapack-ffi-tools-0.0 The netlib packages provide definitions used by the other packages. The "ffi" packages provide foreign imports of all functions from the corresponding netlib package. The "carray" packages contain mid-level functions that use CArrays for vectors and matrices and try to get input and output values right according to the FORTRAN comments. CArrays might not be really appropriate since we always use zero-based arrays but this cannot be expressed in the type. A zero-based variant of CArrays might be better in the future. I use closed-world classes for generalizing functions that are generalizable. This way, I can add "methods" without extending the class. The packages use very basic techniques. No C code, no HSC, no C2HS, no template Haskell, only plain Haskell 2010 with ForeignFunctionInterface. I still have no good idea how to cope with Characters. They are used like enumeration elements, thus the enumerations deserve custom newtype wrappers. But not all enumeration elements are allowed everywhere. I am also uncertain whether to use these wrappers already in the "ffi" packages or only in "carray". I have also not included the FORTRAN comments in the Haskell packages. I have only included links to online docs where available.