Jetpack already provides you a module for After the Deadline proofreading service for improving your writing via artificial intelligence to find your errors and offer smart suggestions. It also provides a number of customization options which you can easily set from your profile (Dashboard -> Users -> Your Profile).
You can very easily enable your website visitors to listen to any text present in your WordPress site. They can listen to your blog posts, pages, footer content or any manually selected text from your site.
YD WPMU Bloglist Widget plugin activates a new sidebar widget that lets you display the list of all subsites of your main parent site using a single or multi-column layout format.