(1). VMD (Visual Molecular Dynamics) is program for interactive display and animation of molecules; It runs on Silicon Graphics workstations and may be compiled for HP-UX workstations if the NPGL library is available. Full source code and binaries for SGI's running IRIX 5.X are included in the distribution. (Note: I did not check the possibility to compile under Linux, however since the source code is available, it could be compiled. See WWW page for details.), http://www.ks.uiuc.edu/Research/vmd/.
(2). NAMD (Not (just) Another Molecular Dynamics program) is a MD program designed for the simulation of large biomolecular systems on distributed memory machines. It is written in C++ in a modular fashion so that new algorithms may be readily tested. (Note: this should be fully Linux compatible, as suggested by authors of NAMD.) http://www.ks.uiuc.edu/Research/namd/ Contact: namd@ks.uiuc.edu.
(3). MDComm is a set of communications routines and programs which exchanges simulation data and interactive forces between NAMD and VMD. It is built on the RAPP software package (developed by Rick Kufrin at NCSA), which simplifies the process of building and maintaining interactive client/server applications. (Note: The latest MDComm library is still under development and the source code and pre-built binaries will be released once it is completed.) http://www.ks.uiuc.edu/Research/mdcomm/