Thunder was launched by screenreader (U.K.). The company is run by blind couple Margaret and Roger Wilson-Hinds. "We see the talking computer as the modern Braille - providing a gateway to learning, work opportunities and a measure of financial freedom and independence," said the couple about their initiative.

Screenreader.net has developed the software in partnership with Manchester-based Sensory Software Limited.

‘Thunder’ will enable visually impaired people to listen to internet sites, shop on-line, and hear their e-mails. With the software reading out to them as they type, they will be able to create letters and other documents with ease.

Thunder has received the backing of a number of organisations, including the National Blind Children's Society (U.K.), the Royal Blind Society (U.K.) and New Zealand Association for the Blind. Chief executive of the Royal Blind Society, Graham Booth said: "This is a simple, easy-to-use product that's going to bring huge benefits to blind people and greatly enhance their quality of life. So, all that is needed to use the Thunder screenreader is a computer running Windows 2000, Windows XP or Vista, plus speakers or headphones. For more information and to download Thunder for free, visit www.screenreader.net