Free printable cryptograms are available at cryptoquote-cryptogram-puzzles.com. This site boasts a wide variety of cryptograms on many different topics and from diverse sources, and every printed cryptogram is ad free.
There are many cryptoquotes from notable people in history on cryptoquote-cryptogram-puzzles.com . Some of the quotations listed are from Eleanor Roosevelt, Agatha Christie and Mark Twain. More modern sources include George H. W. Bush and Ellen DeGeneres. There are also cryptoquotes from fictional characters. For example, one category is devoted to Snoopy from the comic strip "Peanuts."
Although every printed cryptogram is ad free, but there are ads on the website. The ads are not objectionable, however.