I know there is a free download of a JAWS reader. It will expire after so many days. If you google 'Free JAWS Reader' you can read more up on it.
The most popular screen reader worldwide, JAWS® for Windows® works with your PC to provide access to today’s software applications and the Internet. With its internal software speech synthesizer and the computer’s sound card, information from the screen is read aloud, providing technology to access a wide variety of information, education and job related applications. JAWS also outputs to refreshable braille displays, providing unmatched braille support of any screen reader on the market. Get started with training in DAISY format and a trial version of Freedom Scientific's FSReader DAISY player software.
Once I used Microsoft Developer Toolbar. You can download it from their website. It contains various validation tools. Similarly, one is available for Mozilla Firefox also. Not sure if it will work on your server thing, but too good to test Internet.