• The original HMCMLL Barlow-Beeston code
  
• Asymmetric Errors code in R. This can be downloaded or you can include it directly in your R code with install.packages("https://barlow.web.cern.ch/programs/AsymmetricErrors.tar.gz") The current version is 1.00.
  
• The Merlin website
• The code for 'A Calculator for Confidence Intervals' has been rewritten in R (as no-one seems to use java any more) and can be downloaded here . Not fully tested yet. (To run on a Mac you may need to download the XQuartz pckage and then restart the machine.)