jSim for Gromacs is a Graphical User Interface for the Molecular Dynamics Package Gromacs. It has a project style interface to organize your md simulations. It is also possible to start md simulations on remote computers with ssh.
Meredys (MEsoscopic REaction DYnamics Simulator) is a particle based stochastic simulation software designed to model and simulate reaction-diffusion systems. (http://www.ebi.ac.uk/compneur-srv/meredys.html)