For users of FreeFOAM there is the FreeFOAM-Users list. This is the place to ask for help using FreeFOAM, including installation, CFD simulations or writing your own code based on FreeFOAM, such as boundary conditions, solvers etc.
For discussions on the further development of FreeFOAM there is the FreeFOAM-Devel list. This is not the place to go for help. Use the FreeFOAM-Users list instead.
Those who want to follow the development of FreeFOAM closely can also subscribe to the FreeFOAM-Commits list, where commit messages of the FreeFOAM git-repository will be posted. This is a read-only list, do not try to post to it.