Thunder is a free screenreader for blind people on Microsoft Windows. It is not open-source, but it is free for individuals and organisations. It works on Windows XP Service Pack 3 or later, including Windows 7 and 8. If you don’t like Thunder then you might want to try the free open-source NVDA Screenreader.

Thunder in the UK is distributed by Roger Wilson-Hinds at, who does all the technical support for it. If you need help, contact Roger.

Thunder is distributed with the WebbIE set of programs, which provides a text web-browser, a podcatcher, an RSS news reader and other tools. These are maintained by Alasdair King, who also does the Thunder installers but does not do the Thunder code. So if you have a Thunder query, speak to Roger. If you have a WebbIE query speak to Alasdair.

Thunder is available in Arabic, Bulgarian, German, Czech, Spanish, Estonian, French, Greek, English, Italian, Polish, Slowak, Turkish languages.

You can use Thunder from your usb device an installer for usb device is available.