Where can I find Price-Earnings ratios for major indices of US and international stock markets?

It is easy to find P/E ratios of specific stocks, but I have not been able to find P/E ratios of whole indices such as S&P500, FTSE or DAX.
It is easy to find P/E ratios of specific stocks, but I have not been able to find P/E ratios of whole indices such as S&P500, FTSE or DAX. BigCharts only has this information for US indices.

Big Charts will give you the info. See the examples below.

Good luck!