Diamond Sutra - A relatively modern-language translation by the Lotus Sutra Study Center. - http://www.buddhistinformation.com/diamondsutra.htm
The Diamond Sutra - Abridged - A greatly abridged version by George Boeree, Ph.D., that removes the heavily repetitive aspects of the original, which came from the oral tradition. - http://www.ship.edu/~cgboeree/diamondsutra.html
The Diamond Sutra - Translated by A. F. Price and Wong Mou-Lam. - http://community.palouse.net/lotus/diamondsutra.htm