Text-to-Speech
Read&Write for Google Chrome APPROVED FOR WFISD
https://chrome.google.com/webstore/detail/readwrite-for-google-chro/inoeonmfapjbbkmdafoankkfajkcphgd
Read Aloud APPROVED FOR WFISD
https://chrome.google.com/webstore/detail/read-aloud-a-text-to-spee/hdhinadidafjejdhmfkjgnolgimiaplp
Voice Instead
https://chrome.google.com/webstore/detail/voice-instead/kphdioekpiaekpmlkhpaicehepbkccbf
You can see more details on each of these in a the following blog post
http://www.controlaltachieve.com/2016/10/special-needs-extensions.html