We strongly recommend that you visit our main website www.compucell3d.org for package downloads. We update www.compucell3d.org daily so that you have access to latest version of the code and binary packages. Packages provided on simtk.org may not be the latest packages The latest stable version of CompuCell3D with most recent upgrades that include: 1) 10 times faster simulation (compared to previous versions) 2) Embedded Python interpreter 3) Vastly improved 3D graphics and redesigned GUI 4) Expanded and updated documentation For most recent releases, news, model repository, forum, training, advice etc. go to http://www.compucell3d.org The build system was switched to CMake so please make sure to read compilation instructions available at www.compucell3d.org