International Commodity prices data - World Bank's Pink Sheet.

The World Bank releases this comprehensive price list every month. Here's the [link].

The image below will give u an idea of how comprehensive this information is.





















The only hitch with this data is its datedness. It comes with a lag of more than a month. In today's fast-paced financial markets, that's really really old data. But, nevertheless, it offers some utility, or so i think.