Derek Ashauer

TinyMCE has a built in feature to include a predefined list of links to select from. This plugin simply creates a list 
from your pages in WordPress. Create a link like usual in TinyMCE, but you now have a new drop down menu called “Link List” 
where all pages/links are already setup for you.
This currently only works for pages, not for posts.

AWS Easy Page Link

Using the External Link List feature of TinyMCE, this makes it easy to create a link to another page on your website.

Zeno Popovici

Graffino

miguelibero

This plugin adds 1 button to <a href="http://tinymce.moxiecode.com/" rel="nofollow ugc">TinyMCE</a> to clear floating elements. It also adds divs to valid tags so they won’t be deleted if empty.
Originally by <a href="https://wordpress.org/plugins/tinymce-clear-buttons/" rel="ugc">Miguel Ibero</a>.

Clear Floats Button

Adds clear float button to TinyMCE Editor.

AWS Easy Page Link vs Clear Floats Button