Greg - SiteOrigin

Easy Reader adds a button to all your posts. When your users click this, they’ll see an easy-to-read version of content. Check out the <a href="http://siteorigin.com/2010/easy-reader-plugin/" rel="nofollow ugc">demo of Easy Reader</a> – your readers will appreciate this feature.
Easy Reader also lets you add and customize a selection of social media badges at the bottom of your post (everyone loves to share).

Easy Reader

Easy Reader is a WordPress plugin that lets your readers open an easy to read version of your blog posts.

Siteimprove

The Siteimprove CMS Plugin bridges the gap between the WordPress content management system (CMS) and the Siteimprove Intelligence Platform. Now you can scan your website for errors as soon as a page is published, allowing you to fix mistakes, optimize content, and manage your site more efficiently. 
The plugin also provides you access to Prepublish, an add-on which allows you to check your page for issues before it has been published.

Turn your most complex website challenges into manageable tasks—all from a single platform

Easy Reader vs Siteimprove