Win32.Flame
Stuxnet
It is confirmed the source of Stuxnet: US and Israel
http://www.nytimes.com/2012/06/01/world/middleeast/obama-ordered-wave-of-cyberattacks-against-iran.html
http://www.nytimes.com/2012/06/01/world/middleeast/obama-ordered-wave-of-cyberattacks-against-iran.html
Good piece by NYT which claimed the involvement of US and Israel
A long but worth reading story on Wired which goes in-depth of how experts discover the worm (to be translated)