There is a wide variety in use but I managed with just the two pin sockets, either flat or small round pins.
See the sockets here: http://yourenotfromaroundhere.com/blog/2009/05/20/global-map-power-sockets-plug-types/ almost 8 years ago
I recommend buying a universal travel plug adapter. I picked one up on ebay for less than $10 and it has proved excellent as has all the pins for every country.
As seen here: http://www.netgatetrading.com.au/web/product_info.php?cPath=31&products_id=202
The new ones even have a usb slot for charging electronics almost 8 years ago
I use this great little free iPhone app: http://itunes.apple.com/au/app/powerplug/id322021984?mt=8 almost 8 years ago