Replaces Visual Content with Audible or Tactile Equivalent

A free screen review package that enables users to interact with applications and the GNU/Linux operating system with audible feedback from the console using a synthetic speech device.

A text-to speech software assembled in Python that is freely distributed under a BSD license. Users can write a text or copy any text to the clipboard and hear the text spoken through the program. 

A free program designed for blind and visually-impaired people that makes RSS feeds accessible.

A speech synthesizer that supports 64-bit programs and 64-bit SAPI.

Talking technology and software, designed for people with partial sight or blindness, who have little or no experience of using computers. Send emails, browse the web, write letters, read books and newspapers, hear your post read aloud, and other functions. 

Fire Vox is an open-source, freely available talking browser extension for the Firefox web browser. It is a screen reader designed for Firefox.

Emacspeak is a speech interface that allows visually impaired users to interact independently and efficiently with the computer.

Free software that enables blind and screen reader users to use podcasts.

Text to speech program for the web.  

A reading system, converting printed text into natural sounding speech, with the ability to connect any Handy Tech Braille display for Braille output.