French singer and recording star Juliette Gréco, whose career spanned more than six decades, died September 23 at her home in Ramatuelle, France. She was 93. Gréco was one of the few remaining living contemporaries to Jean-Paul Sartre, Simone de Beauvoir, Jean Cocteau, Albert Camus, and other Existentialist artists, writers, and filmmakers. She is described…