Following table lists the information about different screen readers:
Screen Reader
Website
Free / Commercial
Non Visual Desktop Access (NVDA)
http://www.nvda-project.org/ (External website that opens in a new window)
Free
System Access To Go
http://www.satogo.com/ (External website that opens in a new window)
Thunder
http://www.screenreader.net/index.php?pageid=2 (External website that opens in a new window)
Hal
http://www.yourdolphin.co.uk/productdetail.asp?id=5 (External website that opens in a new window)
Commercial
JAWS
http://www.freedomscientific.com/jaws-hq.asp (External website that opens in a new window)
Supernova
http://www.yourdolphin.co.uk/productdetail.asp?id=1 (External website that opens in a new window)
Window-Eyes
http://www.gwmicro.com/Window-Eyes/ (External website that opens in a new window)