mtspec is a Python (ctypes) wrapper for the Multitaper Spectrum Estimation Library mwlib.a by Germán A. Prieto.
Prieto, G. A., R. L. Parker, F. L. Vernon. (2009),
A Fortran 90 library for multitaper spectrum analysis,
Computers and Geosciences, 35, pp. 1701-1710.
doi:10.1016/ j.cageo.2008.06.007
It enables you to calculate Slepian windows, perform multitaper spectral estimations with various options, calculate Wigner-Ville time-frequency distributions, and construct coherence spectra with multitapers.