NMSDECAY: A Fortran Code for Supersymmetric Particle Decays in the   Next-to-Minimal Supersymmetric Standard Model
  The code NMSDECAY allows to compute widths and branching ratios of sparticle decays in the Next-to-Minimal Supersymmetric Standard Model. It is based on a generalization of SDECAY, to include the extended Higgs and neutralino sectors of the NMSSM. Slepton 3-body decays, possibly relevant in the case of a singlino-like lightest supersymmetric particle, have been added. NMSDECAY will be part of the NMSSMTools package, which computes Higgs, sparticle masses and Higgs decays in the NMSSM. 
Debottam Das, Ulrich Ellwanger and Ana M. Teixeira
hep-ph