benaug/move.HMM
Flexible, user-friendly Hidden (Semi) Markov Models for animal movement data (Langrock et al. 2012). This package was developed in part for van de Kirk (2013; http://onlinelibrary.wiley.com/doi/10.1111/1365-2656.12290/full). Since I wrote this package, Theo Michelot, Roland Langrock and others have written a better package for fitting HMMs to animal movement data, named moveHMM (sorry for the confusion!). To my knowlege, though, this package is the only one that fits hidden semi-Markov models.