This varies depending on the media you're looking at (comics, movies, tv), but the more notable items are Batarangs, Bat Grappling Hook, Bat Line, Bat-bolas, and Bat Grenades.
The belt is made of Kevlar it contains a small camera, a two way radio, Batarangs, and ten cylindrical cartridges which he fills with different objects depending on what he needs for that villain. His upgraded belt was bigger and held more things like surveillance controls on his Batarangs, and a button to summon his car.
There are so many to list. He has everything a crime fighter could ever need including the baterrang, bat-lasso, bat liner, bat handcuffs, bat tracer, bat darts, etc. Then he also has things like money and first aid kits. And of course he has grenades and stunning things as well as a huge sword.
Batarangs, Bat-tracer, Grapple Gun, Bat-cuffs, Bat-lasso, Bat-darts, explosive gel, Night Vision Bat googles, Bat-Light, and line launcher are some of Batman's gadgets on Batman's utility belt.
He usually has all different types of things, but he always has what he needs. Most commonly he uses ninja stars and a rope that hooks onto building tops.
The gadgets on Batman's belt always seem to change. They always exactly fit the scenario that he finds himself in. The common gadgets are the flashlight and the pepper spray. Much cooler is the repelling anchor that he has.
The gadgets have varied throughout the many incarnations of Batman, but his utility belt has often contained the following items: batarangs (a bat-shaped weapon that resembles a boomerang), bat-cuffs, tracers, tranquilizer darts, rope, bat-grappling hook, lock picks, a miniature toolkit, a micro camera, and a flashlight.
Over the years Batman's utility belt has evolved from its comic book beginnings. The first official weapon in his belt was a choking gas capsule and in its latest incarnation it boasted everything from Batarangs and a grappling hook to a flame thrower, lock pick, Bat saw and listening devices.
