Summary of survey software: R pps package

The author, Jack Gambino, provides the following description: The pps package contains functions to select samples using PPS (probability proportional to size) sampling. It also includes a function for stratified simple random sampling, a function to compute joint inclusion probabilities for Sampford's method of PPS sampling, and a few utility functions. You can get the package at the R site http://cran.r-project.org/ (The direct URL is http://cran.r-project.org/src/contrib/Descriptions/pps.html)