"Just enter your text, select one of the voices and download the resulting mp3 file to your computer. This service is free and you are allowed to use the speech files for any purpose, including commercial uses.
SpeakIt reads selected text using Text-to-Speech technology with language auto-detection. It can read text in more than 50 languages.
Announcify reads out loud every website you want. For example, if you're too tired but still need to study one more Wikipedia entry, Announcify can help your tired eyes relax.
"FoxVox will speak any text you highlight in a web page. FoxVox can also create audiobooks in mp3, ogg, and wav formats. You can now easily turn your blogs and articles into podcasts."