F.R.E.D. (Fast Rigid Exhaustive Docking) is a protein-ligand docking program, which takes a multiconformer library/database and receptor file as input and outputs molecules of the input database most likely to bind to the receptor. FRED is a command line program, although a GUI is available to setup and create receptor files prior to docking. Typical docking time for FRED is a few seconds per ligand. FRED jobs can also be easily distributed over multiple computers/processors using PVM to further reduce docking time.