FreeFOAM is an unofficial fork of OpenFOAM (http://www.openfoam.org). It is geared towards "freeing" OpenFOAM from its system dependence, enabling it to run natively on e.g. Mac OS X or Cygwin. No new CFD-functionality is being added.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.