I went to a conference about teaching English a couple of weeks ago and saw a presentation by Paul Raine, the owner of a great website Apps4EFL.com. It’s a free website for students and teachers.
The site offers natural text-to-speech listening exercises based on Wikipedia. It also offers the chance to practise your pronunciation in dialogues and create your own gap-fill exercises. You can also practise with Quizlet vocabulary cards.
I think it’s a really useful website, especially considering that it’s free. Go on, take a look!