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) - Free

​

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) - Commercial

​

Supernova: http://www.yourdolphin.co.uk/productdetail.asp?id=1
(External website that opens in a new window) - Commercial

​

Window-Eyes: http://www.gwmicro.com/Window-Eyes/
(External website that opens in a new window) - Commercial