The gladius, the weapon that made the Roman Empire. It was a steel, double-edged thrusting sword designed to kill quickly with minimal effort.
The pila, a type of javelin. Every Roman legionary carried two pila into combat. The pila had a special tip that broke as soon as it made contact with a hard surface; this prevented the enemy from picking it up and using it against the same guy that threw it.
The scutum, or "tower shield". It was made primarily of wood with a reinforced bronze edge. The scutum was designed to give the bearer optimal protection, and could be used to form the famous testudo formation, where mutiple legionaries would overlap their shields to create a protective wall.