- Voice of the Shuttle
A structured and briefly annotated guide to online resources in Philosophy.
VoS emphasizes both primary and secondary (or theoretical) resources, and defines
its audience as people who have something to learn from a higher-education,
professional approach to the humanities.
- The Internet Encyclopedia of Philosophy
The Internet Encyclopedia of Philosophy was founded in 1995 for the purpose of providing detailed, scholarly information on key topics and philosophers in all areas of philosophy. The IEP is free of charge and available to all internet users world wide. (from web site)
- Stanford Encyclopedia of Philosophy (SEP)
"From its inception, the SEP was designed so that each entry is maintained and kept up to date by an expert or group of experts in the field. All entries and substantive updates are refereed by the members of a distinguished Editorial Board before they are made public.
- PhilSci Archive
An electronic archive for preprints in the philosophy of science, browsable