The performance of the molecular docking software varies based on the type of docking (rigid or flexible), active site's properties (hydrophobic or hydrophilic), etc. The short answer is, if you are looking for free software, use Autodock Vina. If you can afford commercial ones, use Glide (Schrödinger Suit) or discovery studio

Or, you can try several docking servers: http://www.swissdock.ch/ http://blaster.docking.org/ http://dinc.kavrakilab.org/ http://bioserv.rpbs.univ-paris-diderot.fr/services/MTiOpenScreen/

the list and specialties of other docking software can be found here: https://en.wikipedia.org/wiki/List_of_protein-ligand_docking_software