FALCOR was for a long time the easiest way to analyse fluctuation test data. Some time ago, the site hosting the FALCOR Java applet went offline.
Enter ShinyFlan, an alternative to FALCOR that uses the R package flan via a Shiny web interface. ShinyFlan was created by Adrian Mazoyer.
Associated with our Journal of Visualized Experiments paper on fluctuation tests, The University of Manchester currently hosts ShinyFlan here:
http://shinyflan.its.manchester.ac.uk/