WTC before 9/11 - Photographs of the complex before September 11, 2004, plus some of the attack, by Maciej Swulinski. - http://www.swulinski.com/9-11/WTCbefore.html
WTC Remembered - A New York City architectural photographer's collection, representing 15 years of photography of the Twin Towers. - http://stanries.com/towers/panoramic.html
History of the World Trade Center - The short history of the world trade center, including maps and photos. - http://www.wtc-history.org/
A Tribute to the World Trade Center - August 8, 2001 - Photographs taken by Jeff Newman of the World trade Center, Winter Garden and Trinity Churchyard in lower Manhattan on August 8, 2001 - http://www.bytenet.net/oddsandends/jnwtc
World Trade Center Radio Tower Poster - Offers large, high-quality color poster of the 374 foot radio tower from One World Trade Center (north building). - http://www.kmoser.com/wtc/