Batman gadgets have evolved through the years depending on the creativity of artist or the director of a certain batman feature. These gadgets are black and often carry the Batman logo. Batmans popularity make batman merchandise very marketable and toyshops stalls everywhere are filled with Batman action figures, vehicles, and gadgets.
The Batmobile is probably the coolest gadget in Batmans arsenal. Different design have been made but the Batmobile is usually a black high-tech, high speed car with bat like tailfins. In some episodes the Batmobile was even equipped with weapons like grenades and machine guns. Batman uses other vehicles in his crime fighting exploits like the Batboat and the Batcycle.
The Batmobile may be cool, but no other Batman gadget is more useful than the Batman Utility Belt. Its where Batman keeps his portable gadgets and tools like the deadly Batarang. The Batarang is a tailor-made boomerang type of weapon that can be modified to suit every villain. The Batrope on the other hand allows Batman to scale and swing from tall buildings.
Robin, Batmans sidekick also uses gadgets that he and Batman concocted together. They would make state of the art Batman Gadgets in the safety of the Batcave. In the Batcave they were able to devise gadgets such as the Bat Radar, Bat Cuffs, Bat Camera, and even a Bat Spray to keep sharks at bay. The Batcave also houses the BatComputer which allows Batman to solve crime and monitor crime activity in Gotham city. Batmans alter ego, Bruce Wayne, is a multimillionaire and the owner of Wayne Corp. the biggest company in Gotham city. Batman used his money to develop weapons and technology that he needs to fight villains that terrorize Gotham city.
Another reason that Batman used gadgets was his dislike of using firearms. His parents were killed by a gunman making him feel that using firearms makes him no different from them. Batman without his Batman gadgets would be a lot less exciting, crime fighting batman style would be ordinary.