PhilPapers - A comprehensive directory of online philosophical articles and books by academic philosophers.
PhilSci Pre-print Archive - An electronic archive for preprints in the philosophy of science offered as a free service to the philosophy of science community. The goal of the Archive is to promote communication in the field by the rapid dissemination of new work. The archive is sponsored by: Philosophy of Science Association, Center for Philosophy of Science and the University of Pittsburgh Library System.