RASC and CASC - Probabilistic biostratigraphy software for calculating zonations with variance analysis and normality tests and interactively calculating well to well correlations with error analysis. - http://www.rasc.uio.no/
PazSoftware - Macintosh software applications for geology, biostratigraphy and paleontology. - http://www.pazsoftware.com/
Paleobiology Software Archive - Software and source code useful to paleobiology and related fields of study. - http://geosci.uchicago.edu/paleo/csource/
Bug Ware, Inc. - Biostratigraphy consulting and database management software. - http://www.bugware.com/