E! Online: John Ritter: Biography, credits, and multimedia.
IMDb: John Ritter: Includes filmography, biography, trivia, quotes, awards, and photos.
John Ritter: Fan page with links and photos.
John Ritter: Fan page with biography, career overview, and photos.
John Ritter News: Topix.net: News about John Ritter continually updated from around the net.
MSNBC: Actor John Ritter Dies at Age 54: Obituary notice.
The John Ritter Stage Page: Information on the stage productions he has been in with some photos.
Weekly Standard: John Ritter, 1948-2003: Written by co-star and fellow comedian Larry Miller.