Answers for "screen reader accessibility"

list of screen reader accessibility

list of free screen readers 
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NVDA (Windows) ...
Serotek System Access (Windows) ...
Apple VoiceOver (OS X) ...
ORCA (Linux) ...
BRLTTY (Linux) ...
Emacspeak (Linux) ...
WebAnywhere (All OSs, Web browsers) ...
Spoken Web (Internet Explorer)