Lectures on Philosophy: Full text of Wittgenstein's 1932-33 lectures on philosophy.
On Certainty: Lecture notes by John Black.
Squashed Wittgenstein: The Condensed Edition of Ludwig Wittgenstein's Tractatus Logico-Philosophicus
Tractatus Logico-Philosophicus: Hypertext edition of the Ogden edition, containing both the English and German texts. It also includes the original introduction by Bertrand Russell
Wittgenstein Think Page: Excerpts from a variety of Wittgenstein's works, journals, and letters.
Wittgenstein's Picture Theory of the Logical Proposition: Includes extensive notes, references and a bibliography. By Kieran Cashell.