According to Wikipedia: With writer A. E. Hotchner, Newman founded Newman's Own, a line of food products, in 1982. The brand started with salad dressing, and has expanded to include pasta sauce, lemonade, popcorn, salsa, and wine, among other things. Newman established a policy that all proceeds, after taxes, would be donated to charity. As of 2010, the franchise has donated in excess of $300 million. He co-wrote a memoir about the subject with Hotchner, Shameless Exploitation in Pursuit of the Common Good.
That is merely a fraction of the charitable work he did with his fame.