This is the one–this translation is from Vatican Radio’s website:

“The Lord has redeemed all of us, all of us, with the Blood of Christ: all of us, not just Catholics. Everyone! ‘Father, the atheists?’ Even the atheists. Everyone! And this Blood makes us children of God of the first class! We are created children in the likeness of God and the Blood of Christ has redeemed us all! And we all have a duty to do good. And this commandment for everyone to do good, I think, is a beautiful path towards peace. If we, each doing our own part, if we do good to others, if we meet there, doing good, and we go slowly, gently, little by little, we will make that culture of encounter: we need that so much. We must meet one another doing good. ‘But I don’t believe, Father, I am an atheist!’ But do good: we will meet one another there.”

(Text from page
of the Vatican Radio website.)
I am a nontheist who has a background of 12 years of Catholic school and many years of editing theology. I find theology an interesting intellectual exercise, and because of the power of the Catholic Church, I think that what the pope–any pope–says has social and political significance.
I think a comment made by Roy Speckhardt, executive director of the American Humanist Association is worth pointing out: “While humanists have been saying for years that one can be good without a god, hearing this from the leader of the Catholic Church is quite heartening.” There is some debate about what exactly Pope Francis meant in his comments as a whole, but I don’t think there’s the slightest unclarity about this: he said, outright, that atheists can do “good.”

Rev. John Zuhlsdorf, a Catholic priest, wrote:  “He was clear that salvation is only through Christ’s Sacrifice. In other words, he is not suggesting – and I think some are taking it this way – that you can be saved, get to heaven, without Christ.”  Of course the pope is affirming that the only way to heaven is through Jesus’ redemptive power–that’s a given in Catholic theology. But I don’t think he is saying that one must believe in that redemptive power to get to heaven; I think he is, possibly quite deliberately, avoiding saying that.