Justified text alignment
Adds a button with text positioning style justify to the form of reply
http://s5.uploads.ru/sbBm5.jpg
Author: Deff
Platform: MyBB

To HTML-bottom (Admin > Options: 2nd form)

Code:
    <style type="text/css">
    #button-justify { background:url(http://savepic.net/6701397.png) center no-repeat!important;}
    </style>
    <script type="text/javascript">
    $(document).ready(function(){
    $("#post #button-center").after('<td id=button-justify align=center valign=center title="Justified text alignment"><img onclick="bbcode(\'[align=justify]\',\'[/align]\')" src="/i/blank.gif"/></td>');});
    </script>

* ATTENTION! Replace this link in the style to the picture for your button.