ChromeOS or, with a speech processor, Linux, Mac, Windows
Free
ChromeVox is a screen reader for Chrome and ChromeOS. The ChromeVox Classic Chrome extension is in maintenance-only mode. The ChromeVox website has more information on the transition to the version bundled with ChromeOS.
Programmed and scriptable in Python. Supports Mozilla Firefox, Microsoft Internet Explorer, Word, Excel and Outlook Express, and Mozilla Thunderbird. Supports web content using JavaScript. Supports Java Access Bridge. IAccessible2 is supported.
The development of Orca was started by Sun Microsystems as part of the GNOME project with contributions from many community members, but since Oracle acquired Sun Microsystems in 2010, Orca turned into a completely community-driven project. It supports AT-SPI, so it works with the GNOME desktop, Mozilla Firefox/Thunderbird, OpenOffice/LibreOffice and GTK+, KDE/Qt and Java Swing/SWT applications. Though it is developed by the GNOME project, it is the most popular screen reader for Unix like systems with graphical environments other than GNOME, like KDE or Unity.
PC-Talker
Kochi System Development
Windows
Commercial
Japanese screen reader. Supports MSAA and Flash.[1]
PCVoz
EzHermatic
Windows
Commercial
Available to buy or download trial. Supports MSAA.
TalkButton works together with Microsoft Word to create an extensive text-to-speech environment. Features include highlighting of spoken text and keyboard echo. Trial version available.
A free program that converts written text into spoken words or even written text into MP3 files.
Seven programs: Text to speech: Reader, Web browser, Mini Clipboard reader, Image Presentation, Appointment Reminder, Speaking Clock, Parental Controls
Mac OS X, iPhone, iPad, Apple Watch, iPods, and Apple TV
Free, Commercial
Free and included with any Apple product. No installation or setup required. Available in over 30 language voices, which are also included for free. See Apple Accessibility[6] for more information.
Japanese screen reader; latest version (ver. 6.0, release date unknown) has specific support for Internet Explorer 6 and Macromedia Flash 6,[8] so seems obsolete and its availability seems unlikely to change.
It was developed by BAUM Engineering, a partner company of Baum Retec AG. Used to be bundled with GNOME, but it was replaced by Orca in GNOME 2.16. Included a screen magnifier. It supported AT-SPI.
It was an alternative screen reader to Orca led by IBM started in 2006. However, it was ceased in 2007 when IBM focused their resources in other projects.[13] It supported AT-SPI.
LookOUT
Choice Technology
Windows
Commercial
Was also available integrated with a screen magnifier. Last mention of it is from 2003. [14]
Trial download available. Supports Microsoft Internet Explorer (including DHTML/Ajax and Flash), Outlook Express, Outlook, Word, Excel, PowerPoint, Skype, and Adobe Reader. No support for Java yet.
All Platforms: Windows, Linux, Mac OS X, iPhone, iPad, iPods, Windows, Android etc..
Free
TeleTender is a voice communication platform for sight impaired people, embedded with a cloud based screen reader. Users can interact with any web pages on the internet by issuing voice commands over the phone. To use it, just dial one of its access numbers.