Maxaud

(NOTE: Before saying this plugin is broken, please understand what this plugin does. It’s meant for WordPress installs that have multiple NETWORKS.)
Adds the ability to have different themes available to different NETWORKS in a multisite atmoshpere.
WordPress allows for multiple “networks”, these are not to be confused with sites. A network holds blogs underneath of it.
This plugin will allow you to separate themes into different directories so they’re only accessable and viewable to the networks you choose.
The plugin will attempt to create a directory in the /wp-content/ directory named /ms-themes/. If it fails to create it, then you will need to make one.
In the /ms-themes/ directory you will create a folder for each network that you want to allow only certain themes to.
Example: 
If you have a theme named “Snarfer Theme”, and you want to only allow it to be viewable/available to the network (and all sites on that network) with the site_id of 7, you would place the snarfer theme directory in /wp-content/ms-themes/7/
Future releases:
<ul>
<li>Network option to turn off auto creation on/off network directories, index.php files.</li>
<li>Network option to display network ID in the footer of sites so network admins can easily tell what network a site is under.</li>
</ul>

Multisite Themes

Adds the ability to have different themes available to different NETWORKS in a multisite atmoshpere.

Luke Gedeon

Matthew Gedeon

Increases productivity for Multi-Site administrators. 
This is an admin site site switcher enabling you, the admin of multiple sites, to select any one of them and go directly to the equivalent page of that site.
For example, you are working on a site named “Penguin” turning on plugins, and you realize that site two (Which we will name “Linx”) has a plugin that needs to be turned on too.
Simply select “Linx” from the drop down box immediately behind the title of your site(Penguin), and it will take you to the plugin page of Linx. This lite plugin has saved myself and others hours of productive time. It’s a must have for any multi-site administrator.
<h3>Readme Generator</h3>
This Readme file was generated using <a href='http://sudarmuthu.com/wordpress/wp-readme' rel="nofollow ugc">wp-readme</a>, which generates readme files for WordPress Plugins.

Admin Site Switcher

This creates a drop-down list of all sites in a multi-site install and lets you switch to the corresponding admin page of the other site.

Multisite Themes vs Admin Site Switcher