The Perspectives of Nietzsche - http://www.mala.bc.ca/~johnstoi/Nietzsche/history.htm 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 - http://www.marxists.org/reference/subject/philosophy/works/ge/nietzsc1.htm The first chapter of Nietzsche's 1885 work Beyond Good and Evil. As translated by Helen Zimmern.
Status Code: 302 - Location: http://www.marxists.org/reference/archive/nietzsche/1886/beyond-good-evil/ch01.htm
Theory of Knowledge - http://www.marxists.org/reference/subject/philosophy/works/ge/nietzsc1.htm Brief essay on the philosopher's epistemology, comparing it to Ludwig Wittgenstein and Thomas Kuhn.
Thoughts Out of Season, Part 1 - http://www.gutenberg.org/etext/5652 Anthony Ludovici translation. Nietzsche's appraisals of David Strauss and Richard Wagner. Available in several formats from Project Gutenberg.
Thus Spake Zarathustra - http://www.gutenberg.org/etext/1998 Thomas Common translation. In plain text, as a zip file, or in plucker format. From Project Gutenberg.