E-Sword is one of the most powerful Bible research utilities. It includes about 20 translations, 15 Greek/Hebrew dictionaries, commentaries, maps, charts, Nasa photos of the middle east, Josephus' works, and many other literary works.
Download the main application, install it and restart. Next goto the download pages and select which add-ons you want. The free downloads are the ones with the down-arrow next to them. Install each add-on separately.