BRUKER TopSpinThis is NOT free software, but a 3-year student license is available for $99. Features data processing of 1D and higher dimensional NMR datasets including Fourier transform, window functions, baseline and phase correction, peak picking, integration, line shape analysis (Gauss/Lorentz, dynamic NMR, solids), relaxation and multiplet analysis, spectrum and Fid simulation, printing/plotting, quantification, and AU/Python/Macro programming.