Expressivo is a free online tool that lets you type, or paste, in up to 200 characters and it then “speaks” what your wrote.
Of course, there are quite a few of these kinds of web applications, and you can read about some of the best at The Best Listening Sites For English Language Learners and The Best Reference Websites For English Language Learners — 2008.
Expressivo, though, has a great feature that the others do not have — it provides a link to what you typed in which you can then email or post on a teacher/bog website so that others can see and hear what your wrote.
I’ll be adding it to those “The Best…” lists I mentioned.
Thanks to Mashable for the tip.