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 Screenreader.net, 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.
Download the correct version of Thunder for you from this page. The URLs will not change and you can link to them.
The current version is 16 December 2013. Installer version 3.1.14. Thunder version 3.1.14.
This is an self-extracting EXE file that installs Thunder and WebbIE in the correct language. It contains both Thunder and WebbIE MSI files.
It sets Thunder to run on the login screen (in the Ease of Access Center) in Windows Vista or 7. Some of the versions also install speech synthesizers to support non-English users. If you don't want any of this stuff, see the MSI installers below.
WebbIE does not have installers/versions for some languages, and Thunder does not have installers/versions for some languages.
The installers are all standard Windows Installer MSI files, so they can be deployed over a network using standard Windows mechanisms.
This is a zip file containing the latest Thunder and WebbIE, currently only for English and Arabic. Other distributions can be done - if you want one, call me.
Check these out to make sure your Thunder installation is all working. Do them in order. Each depends on the previous working.