Liddell, Henry George, Eric Arthur Barber, Henry Stuart Jones, Roderick McKenzie, and Robert Scott. Oxford, Clarendon Press, 1968. PA445.E5 L71 1968 (Religious Studies and Philosophy Library Folios)
Textkit Greek and Latin Reading Tools contains a page, Learn Ancient Greek, which provides Greek Reading Texts, Reference Grammars, and Textbooks available as PDFs.
This website provides a searchable online version of S. C. Woodhouse's English-Greek Dictionary A Vocabulary of the Attic Language (1910). The vocabulary is based on the Greek of the following individuals: Thucydides, Plato, Xenophon, Demosthenes, the Orators, Aeschylus, Sophocles, Euripides and Aristophanes.