Use this article as an example: http://www.edutopia.org/blog/differentiated-instruction-myth-no-time-john-mccarthy 

Mercury Reader: Removes extraneous text, ad and other detractors from a website, making it much easier to read.
https://www.postlight.com

Smmry summarizes either text or a webpage into the designated number of sentences: http://smmry.com/

Read & Write for GoogleRead & Write for Google takes reading support to the next level by making many of the functions of Read & Write Gold available as a chrome extension for free.  It can read any text web to the student, while highlighting the words being spoken.  The paid version also works with PDFs. It is available from the Chrome Store: https://chrome.google.com/webstore/detail/readwrite-for-google/inoeonmfapjbbkmdafoankkfajkcphgd?hl=en-US

SAS Writing Navigator Tools? https://www.writingnavigator.com

The Writing Advisor tool is an add-on for Google Docs: http://blogs.sas.com/content/sascp/2015/08/11/how-to-get-started-with-the-writing-navigator-add-on-for-google-docs/

Scrible (www.scrible.com) is a Website annotation tool. 
Skim.it (http://skim.it) summarizes webpages and provides an easy to use dashboard for keeping track of resources.  Works as an extension from the Chomestore: https://chrome.google.com/webstore/detail/skimit/kgefmeckbcbdeebelncmiehfcnamjimk

DyslexiaOpen Dyslexia changes the font on webpages to one that is more readable for students with Dyslexia.  It is available from the Chromestore:  https://chrome.google.com/webstore/detail/opendyslexic/cdnapgfjopgaggbmfgbiinmmbdcglnam

Dyslexia Friendly is similar to Open Dyslexia but has some different features.  It is also available from the Chromestore:  https://chrome.google.com/webstore/detail/dyslexia-friendly/miepjgfkkommhllbbjaedffcpkncboeoDiigo: a terrific tool for keeping track of web resources and pro version is free for education: http://diigo.com