A number of translations of Aristotle's Nicomachean Ethics are available for free online. These will be older translations, long since passed into the public domain, which is why they are free.

• Nicomachean Ethics, Rackham translation (Perseus Project)
• Nicomachean Ethics Ross translation (Wikitexts)
• Nicomachean Ethics, Ross translation (McMaster University)
• Nicomachean Ethics, Chase translation (Wikitexts)
• Nicomachean Ethics, Taylor translation (Classical Liberal Arts Academy)
  

You can also find the Greek original of the Nicomachean Ethics online

• Nicomachean Ethics in Greek (Perseus Project)

You can also find the text read aloud by volunteers in the Librivox project

• Nicomachean Ethics, Taylor translation (Librivox)