Hulk Stuff

            Bruce Banner doesn’t use that much tech.  He did however; invent a drug that would lower his heartbeat to 1 beat per minute to prevent him from transforming.  It didn’t work at all for him but the drug was useful for Nick Fury (director of S.H.I.E.L.D.) who faked his death.  In the comics he has a force field to protect him from stronger forces in addition to a teleporter, which we haven’t seen him do either in the movies yet.
            Besides from turning into a giant green behemoth; Bruce is remarkably intelligent.  Bruce himself is unable to measure his level of intelligence and that he is one of the greatest scientific minds on Earth.  He is an expert in biology, chemistry, engineering, physiology, and nuclear physics.