Julian Assange is an Australian hacker and publisher, best known for his role as editor-in-chief for Wikileaks. 
1. On his old blog, IQ.org, he wrote a June 24, 2006 post entitled 'Canberra" in which he wrote:
"After my state sponsored stay at ANU, I ended up at a backpackers filled with some of the 900 Christians from the Australian University Christian Convergence. Most were young women and I turned, somewhat disgracefully, into a sort of Chesterton's Hardy, the village atheist, brooding and blaspheming over the village idiot, while they, for their part, tried to convert me with the rise and fall their bosoms.
One of the devout was the lovely daughter of a New Castle minister. At some point in my unintended wooing of her, she looked up, fluttered her eyelids and said 'Oh, you know so much! I hardly know anything!'. 'That is why you believe in God," I explained. This conversational brutality took her breath away and she swooned. I was exactly what she secretly longed for; a man willing to openly disagree with her father. All along she had needed a man to devote herself to. All along she had failed to find a man worthy of being called a man, failed to find a man who would not bow to gods, so she had chosen a god unworthy of being called a god, but who would not bow to a man."
2. Assange also created an OK Cupid profile - using the pseudonym Harry Harrison - in which he listed his religious beliefs as "atheist".  OK Cupid CEO Sam Yagan confirmed that they believe this profile is legimate. 
3. Lastly, during an episode of his show "The World Tomorrow" on RT, Assange asks the following, during an interview with Hassan Nasrallah, the leader of Hezbollah: "“You have fought against the hegemony of the United States. Isn’t Allah, or the notion of a God, the ultimate superpower, and shouldn’t you, as a freedom fighter, also seek to liberate people from the totalitarian concept of a monotheistic God?”