The Perspectives of Nietzsche - A series of quotes, aphorisms and excerpts organised under concepts for which Nietzsche has become famous, such as "Will to Power".
The Prejudices of Philosophers - The first chapter of Nietzsche's 1885 work Beyond Good and Evil. As translated by Helen Zimmern.
Theory of Knowledge - Brief essay on the philosopher's epistemology, comparing it to Ludwig Wittgenstein and Thomas Kuhn.
Thoughts Out of Season, Part 1 - Anthony Ludovici translation. Nietzsche's appraisals of David Strauss and Richard Wagner. Available in several formats from Project Gutenberg.
Thus Spake Zarathustra - Thomas Common translation. In plain text, as a zip file, or in plucker format. From Project Gutenberg.