Spectral Mixture Analysis for Time series (SMAT; aka Relative Spectral Mixture Analysis) as an IDL .sav file that can be run with the (free) IDL Virtual Machine Software.

Multiple Endmember Spectral Mixture Analysis (MESMA) as an IDL .sav file (with all routines embedded) that requires a full IDL license to run via the command line.

Variogram Parameter Estimation (VPE) as an IDL .sav file that can be run with the (free) IDL Virtual Machine Software. For Description of the Method of Estimating Errors in Variogram Parameter Fit Parameters, See Li, J., G.S. Okin, L.J. Alvarez, and H.E. Epstein, 2008, Effects of wind erosion on the spatial heterogeneity of soil nutrients in two desert grassland communities, Biogeochemistry, 8(1) pp. 73-88, 10.1007/s10533-008-9195-6.

Connectivity Calculator as an IDL .sav file that can be run with the (free) IDL Virtual Machine Software. For description of how this algorithm, to calculate the probability distribution of distances from a class, see: McGlynn, I.O., and G.S. Okin, 2006, Characterization of shrub distribution using high spatial resolution remote sensing: ecosystem implication for a former Chihuahuan Desert grassland. Remote Sensing of Environment, 101, 554-566.