Comprehensive index and bibliography DB, Archives from the 1800's to present. Journals, books, the largest open access archive in philosophy and researchers' blogs and pre-publishing discussions. 

PhilPapers is a comprehensive index and bibliography of philosophy that monitors and collects sources of research content in a wide range of topics in philosophy, including journals, books, open access archives, and personal pages maintained by academics. PhilPapers currently includes 1,100,530 research books and articles.