Dmitry Fatakov

You can edit and clone any options of one blog and copy this items to the other blogs in multisite installation
<h3>License</h3>
WPMU copy options plugin is copyright © 2013 with <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a> by dmf_tuva.
This program is free software; you can redistribute it and/or modify it under 
the terms of the <a href="http://www.gnu.org/copyleft/gpl.html" rel="nofollow ugc">GNU General Public License</a> as published by the Free 
Software Foundation; either version 2 of the License, or (at your option) any 
later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY 
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
PARTICULAR PURPOSE. See the GNU General Public License for more details.

WPMU copy options

Enej Bajgorić

ctlt-dev

oltdev

An easy way to modify the css globally on your site.
As an admin you are able to edit the css from the front end.

Improved Simpler CSS

Add the ability to add css to your existing style sheet.

WPMU copy options vs Improved Simpler CSS