Guahan Web

This plugin gives you the flexibility to add Ajax handling for your comments to keep the page from having to refresh every post. The administration panel will allow you to customize your processing, success and error messages.
Additionally, this plugin gives you the option of setting up the WYSIWYG editor for comment submission as well. The admin panel will give you the option to show/hide various button groups for the editor and only allows basic editing capabilities. If logged in as administrator, you will still receive the full WYSIWYG editor for your commenting.

GuahanWeb AJAX & WYSIWYG Comments

Adds customization for Ajax commenting and allows for enabling of custom WYSIWYG editor.

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.

GuahanWeb AJAX & WYSIWYG Comments vs Clear Floats Button