Here is the Top 10, as listed by PPP GDP, using 2010 GDP figures:
Ranking Country Approximate GDP- Purchasing Power Parity
1 United States of America $14,624,180,000,000 (that is $14.6 trillion dollars if you are trying to count zeros)
2 China $10,084,370,000,000
3 Japan $4,308,630,000,000
4 India $4,001,100,000,000
5 Germany $2,932,040,000,000
6 Russia $2,218,760,000,000
7 Brazil $2,181,680,000,000
8 United Kingdom $2,181,070,000,000
9 France $2,146,280,000,000
10 Italy $1,771,140,000,000