Cartes du Ciel is still the most complete freeware planetarium to use.
Though many planetarium have a red nightsky mode, I haven't seen any program that completely gives you a muted red screen. Your best bet is a red semi-transparent acrylic overlay for the screen. I have cut my own and can show you at the StarBQ. A vendor at the Nebraska Star Party had a large variety of precut ones at a decent price.