Certain Doubts
Certain Doubts, a blog devoted to matters epistemic, was originally sponsored by the University of Missouri when its administrator Jonathan L. Kvanvig was professor of philosophy and chair of the philosophy department there. It has since moved to Baylor University.
Internet Encyclopedia of Philosophy
The Internet Encyclopedia of Philosophy was founded in 1995 as a non-profit organization to provide open access to detailed, scholarly information on key topics and philosophers in all areas of philosophy.
PEA Soup
A blog dedicated to philosophy, ethics, and academia.
PhilPapers
PhilPapers is a comprehensive index and bibliography of works in philosophy. In addition to indexing books and journal articles, it monitors open access archives and personal pages for articles by academic philosophers.
Stanford Encyclopedia of Philosophy
The Stanford Encyclopedia of Philosophy organizes scholars from around the world in philosophy and related disciplines to create and maintain an up-to-date reference work.