CompuCell3D 3.7.5 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The program is categorized as Education Tools. The most popular version of the program 3.7. We recommend checking the downloaded files with any free antivirus. This free tool was originally created by Biocomplexity Institute, Indiana University, Bloomington, IN.
From the developer:
CompuCell3D is an open-source simulation environment for multi-cell, single-cell-based modeling of tissues, organs and organisms. It uses Cellular Potts Model to model cell behavior. The program allows users to build sophisticated models more easily and quickly than does specialized custom code. It also facilitates model reuse and sharing.
You may want to check out more software, such as Avantage BPM Foundation, Adding Machine or gitoolbox, which might be similar to CompuCell3D.