shazdeh

A simple plugin to eliminate the need to “Network Activate” whenever a new theme is added to the network. This is a tiny time-saver for developers and theme testers who deal with lots of new themes regularly.

WPMU Allow All Themes

Automatically enable all themes available on your network to all websites in the network.

feedmeastraycat

WordPress removes the Update Services ability (Settings – Writing) when you create a network (aka enables WordPress MU/Multisite). 
Activate this plugin to get it back.
Note: This is only for WordPress setups with a network, aka multiple sites, aka multisites, 
aka WPMU in WordPress 3 and later.
This plugin might work with older WordPress MU sites. I haven’t tested it though. If you do, please 
let me know how it turned out.
<h3>Files</h3>
<ul>
<li>/activate-update-services/activate-update-services.php</li>
<li>/activate-update-services/README.txt</li>
</ul>

Activate Update Services

WordPress removes the Update Services ability when you create a network. Activate this plugin to get it back.

WPMU Allow All Themes vs Activate Update Services