Translations of De Anima in the public domain. All can be downloaded and most are in pdf format.

Aristotle's psychology; by Aristotle. Hammond, William A. 1861-1938. Published 1902
http://hdl.handle.net/2027/mdp.39015018629165

Aristotle's psychology, in Greek and English, with introduction and notes by Edwin Wallace. 1882
http://hdl.handle.net/2027/mdp.39015002964008

De anima; with translation, introduction and notes, by R. D. Hicks. by Aristotle. Hicks, Robert Drew, Published 1907
http://hdl.handle.net/2027/coo.31924073426425

De anima, in the version of William of Moerbeke; and The commentary of St. Thomas Aquinas. Translated by Kenelm Foster and Silvester Humphries, with an introd. by Ivo Thomas.
http://hdl.handle.net/2027/mdp.39015005078467

Works translated into English under the editorship of W.D. Ross.(by Aristotle.) Smith, J. A.
Published 1908
http://hdl.handle.net/2027/mdp.39076005283689

Aristotle on the Vital Principle / translated from the original text, with notes by Charles Collier, published 1855
http://books.google.com/books?id=r8MVAAAAYAAJ&ots=xw3QPPzLkJ&dq=%22aristotle%20on%20the%20vital%20principle%22&pg=PR2#v=onepage&q=%22aristotle%20on%20the%20vital%20principle%22&f=false

The Internet Classics Archive |On the Soul | by Aristotle | J. A. Smith
http://classics.mit.edu/Aristotle/soul.html also at
http://ebooks.adelaide.edu.au/a/aristotle/a8so/index.html

Complete Works of Aristotle (PDF, Open source)http://ia600405.us.archive.org/18/items/CompleteWorks/Aristotle-CompleteWorks.pdf