Elementally, we have lots of Carbon, Oxygen, Nitrogen, and Sulfur, decent amounts of Argon, Helium, Neon, and Hydrogen, and trace amounts of Chlorine and Fluorine.
Breathable air, no problem
Drinkable water from the water vapor (pretty rare) and chemically extracted from the sulphuric acid
Chemical rocket propellants (LOX, Methane, Hydrogen, and with a lot more work maybe some storables like N2O, N2O4, Hydrazines, H2O2, and storable hydrocarbons and alcohols)
Most plastics including PE, PP, PC, PET, PVC, Epoxies, Teflon and other flouropolymers (in modest quantities–the Florine’s pretty rare)
Carbon and aramid fibers
Graphite, Graphene, and Carbon Nanotubes
Sulfur “Concrete” (likely using graphite whiskers as the reinforcement) http://en.wikipedia.org/wiki/Sulfur_concrete