This British directory carries extensive links, nicely organized. The copyright date is one year old, however it has a new look and is fast. Approximately fifty different sub-topics are given, each with their list of links. Unfortunately updating ended July 2011.
Noesis is a limited area search engine for open access, academic philosophy on the Internet. Noesis is currently funded by the Digital Humanities Initiative of the National Endowment for the Humanities.
This site offers helpful information for students of the Western philosophical tradition. The elements you will find on this site includes a survey of the history of Western philosophy as well as links to other philosophy Sites on the Internet.
Erratic Impact's Philosophy Research Base is categorized by history, subject and author. Integrating text resources with the best online resources, this study guide attempts to aid both academic and general interest in all philosophical genres and their related fields.