Classical Utilitariansm - http://www.la.utexas.edu/cuws/
Contains selections from the writings of the classical utilitarians -principally Jeremy Bentham, John Stuart Mill, and Henry Sidgwick- with commentary thereupon.

Utilitarianism Resources - http://www.utilitarianism.com
Classic utilitiarian texts; defending utilitarianism from its critics; its relation with collectivism and hedonism - and the ultimate aim of utilitarianism.

Utilitarianism Glossary - http://www.utilitarianism.com/glossary.htm
Entries on utilitarian philosophers and terms by the Penguin Encyclopedia of Philosophy.

'Utilitarianism' - http://www.utilitarianism.com/mill1.htm
Classic presentation of utilitarianism, by one of its most prominent defenders, John Stuart Mill.

'The Singer Solution to World Poverty' - http://www.petersingerlinks.com/solution.htm
Article arguing, from a utilitarian perspective, that citizens of affluent nations ought to give substantial amounts of their income to foreign aid agencies, by Prof. Peter Singer, linked to his extensive website.

Utilitarian Philosophers - http://www.utilitarian.net
Lists links to writings by and about the major utilitarian figures --David Hume, Jeremy Bentham, James Mill, John Stuart Mill, Henry Sidgwick, R. M. Hare and Peter Singer.

'Primer on the Elements and Forms of Utilitarianism' - http://web.missouri.edu/~philrnj/utilnote.html
Discussion about the varieties of utilitarianism, by R. N. Johnson. Utilitarianism is considered both as a theory of what is right and a theory of what is good.

utilitarism.net - http://www.utilitarism.net
Swedish site for information on and discussion about utilitarianism.

'Utilitarianism' - http://www.utilitarianism.com/utilitarianism.html
Encyclopedia Britannica article, by Henry R. West.

'Could Kant have been a Utilitarian?' - http://deontology.com/
Provocative extract from the book Sorting Out Ethics by the late R. M. Hare. "Kant, I shall argue, could have been a utilitarian, though he was not. His formal theory can certainly be interpreted in a way that allows him - perhaps even requires him - to be one kind of utilitarian."

'Utilitarianism and the Future' - http://www.ne-plus-ultra.org/smart.htm
Excerpted from J. J. C. Smart's 'An Outline of a System of Utilitarian Ethics' (Cambridge, 1973).

'How to argue with an anti-utilitarian' - http://www.petersingerlinks.com/hare/anti-utilitarian.htm
Suggested argumentative strategies for utilitarians, by R. M. Hare.

Utilitarian FAQ - http://www.ianmontgomerie.com/manifesto/utilitarianfaq.html
Detailed discussion of contemporary utilitarian theory, including answers to a long list of frequent criticisms. By Ian Montgomerie.

'Utilitarianism' - http://www.wikipedia.org/wiki/utilitarianism
Wikipedia entry.