The supplies needed for making truffles are very few and most are just suggestions.

Dipping fork - dipping forks have thin tines so that when dipping a truffle, less chocolate adheres to the bottom of the candy.  This saves chocolate and creates a prettier finished product.

Double boiler - this is a wonderful tool for melting chocolate.  Because the chocolate is enclosed in the top pan it will protect the chocolate from steam.

Foils and cups - Found at craft stores they are a nice finishing touch to the truffles.  Using different colors helps to identify the flavors.

Melon baller - This tool helps in scooping out even portions of chocolate.  There are also cookie scoops that are made in smaller sizes that can be used. 

Scale - a great tool for measuring the chocolate, especially when recycling leftovers.

Strainer - used to strain the lumps out of cocoa powder giving a nicer coating to the truffle.