Tandem is a utility tool that is useful in microsatellite analysis as it helps to bin microsatellite allele sizes in an internally consistent manner. A first version of Tandem is available as a Ruby script to be executed on the command line or as a minimal GUI program. Both of these are available from the website of the Salzburger Lab at the University of Basel and have been presented in Matschiner & Salzburger (2009).
A second version of Tandem, Tandem2, was developed for Mac OS with a more extensive graphical user interface that included the automated highlighting of problematic alleles and the possibility to edit these directly in the interface, as well as additional export options. However, Tandem2 was written in MacRuby, which unfortunately has not been supported by Mac OS newer than Mac OS Sierra. Thus, this new version may only be useful for users who still happen to run an old Mac OS.More