PFC2D 4.0 was available as a free download on our software library. The actual developer of the software is Itasca. Commonly, this program's installer has the following filename: pfc2d.exe. The program lies within Education Tools, more precisely Science Tools. The most popular version among the software users is 4.0.
From the developer:
PFC2D (Particle Flow Code in 2 Dimensions) is a discontinuum code used in analysis, testing, and research in any field where the interaction of many discrete objects exhibiting large-strain and/or fracturing is required.
Because PFC2D is not designed to examine a particular type of problem, its range extends to any analysis that examines the dynamic behavior of a particulate system.
You may want to check out more software, such as StatPlus 2007, Avantage BPM Foundation or Adding Machine, which might be related to PFC2D.