...if so, check programs from Prof. Llinas's lab: MIDGE, CLOUDS, SPI, BACUS and ABACUS.

A brief description of the program, that was copied from the Prof. Llinas's website:
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"MIDGE: Model-independent refinement of interproton distances generated from h-1-nmr overhauser intensities

CLOUDS: Protein structure elucidation from NMR proton densities.

SPI: a Bayesian protocol for uncovering spin systems.

BACUS: A Bayesian protocol for the identification of protein NOESY spectra via unassigned spin systems.

ABACUS: a Direct Method for Protein NMR Structure Computation via Assembly of Fragments"