There are a number of excellent Resarch Ethics resources available on the web. Here are just a few:

Office of Research Integrity, United States Department of Health and Human Services
The Office of Research Integrity (ORI) promotes integrity in biomedical and behavioral research supported by the Public Health Service (PHS) at about 4,000 institutions worldwide. ORI monitors institutional investigations of research misconduct and facilitates the responsible conduct of research through educational, preventive, and regulatory activities.

Academic Integrity in the Classroom: A Selected List of Resources for the University of Michigan
Even though the title suggests the resources found at this site are specifically for those at the University of Michigan, there are numerous resources that are applicable to students and instructors at any institution.

Case Western Reserve University’s Online Ethics Center for Engineering and Science
Offers case studies, various informational links, and focuses on research integrity, human subjects, and animal welfare.

ELSI Project: Ethical, Legal and Social Issues in Science
The ELSI Project was developed by the Lawrence Berkeley National Laboratory (LBNL) as a way to explore ethical issues that surround research occurring at LBNL and other national labs.

Ethics and Science: Washington University, St. Louis
Ethics information covering all areas and disciplines are provided.

Ethics in Science
Site is divided into two main sections, Science Ethics Resources and Selected Essays on Ethics in Science, each with multiple links. Good for general ethics in science resources, as well as more chemistry-specific articles.

Ethics on the World Wide Web
The School of Communications at California State University, Fullerton developed this ethics site that contains information on associations, codes, and topic areas such as science, business and medicine.

The Eubios Ethics Institutes Information Sources for Bioethics
The Eubios Ethics Institute is a nonprofit organization based in New Zealand and Japan. The web site given first is a large list of ethics-related links, such as ethics centers, on-line journals, and other information sources. The web site in parentheses is the home page for the Institute and may be more useful, offering on-line publications by the Institute, teaching materials, and links to various English and Japanese bioethics web sites.

Integrity in Science A CSPI Project
Virginia Ashby Sharpe, Ph.D., a bioethicist who has focused her career on ethical issues in health care and the environment, directs this project of the Center for Science in the Public Interest.

Internet Resources Research Ethics
A mega "catalog' of Internet resources covering various academic subject areas. An extensive section on research ethics has been compiled at this site.

The Kenan Institute for Ethics
The Kenan Institute for Ethics at Duke University was started in 1995 with a 5 year grant from the William R. Kenan Jr. Fund for Ethics. The Links section of this site has numerous resources covering areas such as ethics associations & centers, journals & Web sites, business & professional ethics and research ethics.

Markkula Center for Applied Ethics
The Markkula Center for Applied Ethics was founded in 1986 and has grown into one of the most active university applied ethics centers in the country. It is based at Santa Clara University.

North Carolina State University Research Ethics Modules
North Carolina State faculty experts were instrumental in the development of the 10 ethics modules presented at this site. Each module covers a specific topic in the area of research ethics, such as authorship, animal & human subjects, research misconduct and intellectual property.

The Online Ethics Center for Engineering & Science
The Online Ethics Center is a great ethics resource for the sciences. It was established in the fall of 1995 under a grant from NSF, and its mission is to "provide engineers and scientists and science and engineering students with resources useful for understanding and addressing ethically significant problems that arise in their work life". Links to cases, essays, codes of ethics and reference materials are merely a few of the resources found at this site.

On Line Science Ethics Resources
Maintained by Brian Tissue, this site is divided into two major headings, On-line Resources and Ethical Codes of Conduct, each of which with several subheadings. These subheadings are Web Sites to Search, Centers and Programs, Individuals, Miscellaneous, Institutional Policies, Professional Societies, and Publishing Guidelines. Of particular utility are some of the sites under the Individuals and Miscellaneous headings, which feature scientists’ views on scientific ethics and some interactive on-line case studies, respectively.

Open Directory - Science in Society Research Ethics
The Open Directory Project claims to be the "largest, most comprehensive human-edited directory of the Web". Resources included in their Research Ethics section include general research ethics materials, bioethics resources and guidelines to codes & publications. Related links for information on subjects like issues in science and technology can be found in their "see also" section.

Philosophical Foundations of Scientific Ethics
David Resnik, Department of Philosophy at the University of Wyoming presented this paper at the Ethical Issues in Physics Workshop. Resnik discusses the concepts of scientific ethics and suggests that internal concerns and the norms of society guide scientific ethics.

Research Ethics Resources on the World Wide Web
Ethics information covering all areas and disciplines are provided.

Science and Ethics: Links to Research Ethics Issues and Resources
Features several good links to sites that feature a specific well-known case study, such as the Baltimore Case and the DeLuca Case. This site is maintained by Clark Wolf, Department of Philosophy, University of Georgia.

University of California San Diego Research Ethics Program
University of Pennsylvania’s The Center for Bioethics "Virtual Library" http://www.med.upenn.edu/~bioethic/library/resources/bioethics.html Essentially an on-line collection of bioethics related articles. A good basic reference tool.