The American Philosophical Association's official web site contains information and resources for professional philosophers as well as links to electronic journals, web sites, and academic philosophy departments.
This comprehensive and well-organized gateway provides access to over 15,000 philosophy related sites. Resources are browsable by topic or philosopher and include several other categories of interest, including Encyclopedia Entries, Bibliographies, Discussion, Organizations, and Images.
This portal is maintained by Prof. Lawrence M. Hinman at the University of San Diego. It includes discussion forums, links to the full text of major philosophical works, articles and multimedia resources on a variety of ethics topics, and more.