"Read any text out loud."
DSpeech is a simple, basic and practical voice synthesizer without huge pretentions, able to read text in any document you open, or that which you write directly.
DSpeech reads with a British accent, so the vocalization and intonation of some foreign words might sound a little odd, even incomprehensible in some cases, but in general you can understand it.
Despite that, DSpeech is recommended for reading texts in English with perfect pronunciation. And you can download it for free!