Early Modern Texts
Jonathan Bennett's  is freely available to the public and includes works by Berkeley, Hume, Spinoza and others.

Nietzsches Werke: Historisch-kritische Ausgabe 
This collection of philosophical texts was published by Intelex Corp. All texts in the archive are valid SGML documents, tagged in conformance with the TEI Guidelines, and converted to the TEI Lite DTD for wider use.

Past Masters
The series includes the largest collection of full-text electronic editions in philosophy in the world. Includes the complete works of Aristotle, Hume, as well as collected works of  Hegel, Kant, Kierkegaard, Peirce, Rousseau, Wittgenstein and others.

Patrologia Latina Database   
The Patrologia Latina Database contains 221 volumes and represents a complete electronic version of the first edition of Jacques-Paul Migne's Patrologia Latina (1844-1855 and 1862-1865).