title: TTS tool for commercial use
body: <p>Could you, guys, help me with searching some good TTS (Text-To-Speech) tool for commercial purposes? I checked several tool, but some of them was too expensive ($5000+), such as AT&amp;T, other - low-quality, such as FreeTTS. I need free or low-price (up to $500) application or web service to create <em>wav</em> or <em>mp3</em> files of English words and phrase in quality suitable for education purposes.</p>
  
  <p>Thanks!</p>
  
  <p>P.S. Large library of ready wav or mp3 files will be also OK.</p>