If you're looking for a single comprehensive web site dealing with ethics issues, try the University of British Columbia (UBC) W. Maurice Young Centre for Applied Ethics.

If you're looking more specifically for codes of research ethics, most disciplinary associations have their own. Here are a few:

Academy of Criminal Justice Sciences (ACJS) The Canadian Sociology and Anthropology Association (CSAA) The American Sociological Association (ASA)
The American Anthropological Association (AAA) Codes of Research Ethics The Tri-Council Policy Statement (SSHRC, NSERC, MRC)
The American Psychological Association (APA) The Canadian Psychological Association (CPA) The American Political Science Association (APSA)

(This page was last updated on 16 October 2005 ).