A comprehensive index and bibliography of philosophy maintained by the community of philosophers which also includes an open access archive in philosophy.
Catalog of over 62 million titles cataloged by libraries worldwide that includes manuscripts written as early as the 1000 B.C., books, audio visual media, and internet source
The digital Loeb Classical Library offers an interconnected, fully searchable, perpetually growing, virtual library of Greek and Latin Classical literature, history, philosophy, and more.