Displays bold, italic, add link and quote buttons on top of the comment form.
This plugin displays the most basic of quicktag buttons on your comment forms, using the Quicktag API built into WordPress (as of 3.3).
You can turn these on and off for bbPress or comments on the discussions page (see the screenshots). Please note, the plugin defaults to off, so you have to go turn them on. Auto-activating isn't nice, as it may conflict with other plugins.