Athame
Cauldron
Wand
Censer
Pentacle
Chalice
Broon
Book of Shadows
These are just a few of the basics--you can certainly improvise and add different items to represent different element. Or, like some Wiccans, you can simply use candles and incense during rituals. Either way, it's the energy YOU put into it that makes the ritual powerful and syccessful, not the tools you use. Tools are simply a way to direct and focus energy for magickal workings. They have no power except for what we give them. Tools should be consecrated, or cleansed, before used in a circle, to clear them of any negative energies.