Stanford Encyclopedia of Philosophy entry This is a very complete description of the prisoner's dilemma and its variations. http://plato.stanford.edu/entries/prisoner-dilemma/

Prisoner's Dilemma by the constitution web site Some links on ethical and political aspect of the Prisoner's Dilemma. http://www.constitution.org/prisdilm.htm

The Taumoda Lab This site offers a way to learn how to study the evolution of cooperation through 3 models, based on the Prisoner's Dilemma. (Java applets included). http://www.taumoda.com/web/PD/lab.html

Xerox PARC This is a directory containing a lot of papers on Dynamics of Computation Area (Evolution of cooperation) from the XEROX PARC. ftp://parcftp.xerox.com/pub/dynamics/

Annotated Bibliography on The Evolution of Cooperation A large annotated bibliography on the Prisoner's Dilemma and cooperation, compiled by Robert Axelrod and Lisa d'Ambrosio. http://pscs.physics.lsa.umich.edu/RESEARCH/Evol_of_Coop_Bibliography.html

The Prisoner's Dilemma A simple yet powerful model for the problem of cooperation versus conflict in groups. The JAVA applet demonstrates the spread of 'altruism' and 'exploitation for personal gain.' http://www.xs4all.nl/~helfrich/prisoner/

Iterated Prisoner's Dilemma This site aims to be a comprehensive repository of information on the Iterated Prisoner's Dilemma, a major topic in artificial life, and a look at cooperation (and evolution of cooperation) between agents. http://www.lifl.fr/IPD

Iterated Prisoner's Dilemma Game and simulation based on Prisoners Dilemma game theory as described in The Selfish Gene by Richard Dawkins: coded in Javascript by Wayne Davis. http://www.iterated-prisoners-dilemma.net/

Panoptico Software art based on artificial life algorithms by Iván Abreu. http://www.espaciosinaire.com/panoptico