The Wand
The wand is used to greet deities and channel energy. It is a tool of peace and of the Air element. You can buy a wand in pagan shops and on the internet, but it is more powerful to make one yourself. This could just be from a nice looking stick to a highly decorated wand.
Athame or Ritual Dagger
The athame (ritual Dagger) is of the fire element. It traditionally has a black handle although it is not neccisary. It is never used to draw blood.
Chalice (cup)
Used to keep water and/or wine in. It is of the Water element.
Jewellry, Amulets etc...
Although not really a tool, most witches consider it a vital piece of equipment.
Cauldron
An extremely important and useful piece of equipment. It is of the water element.