No. 1 Podcasting plugin for WordPress.
Embed a post or a category of posts that is within another website on the same Wordpress network (multisite).
Allows your visitors to leave business / product reviews. Testimonials are in Microdata / Microformat and may display star ratings in search results.
When a logged in user visits a blog for which they have no capabilities (i.e. not subscriber), they are automatically added as a subscriber.
A Robots.txt Manager Plugin for WordPress Multisite Networks. Quickly and easily manage all robots.txt files on a WordPress Multisite Website Network.
MU Plugins Tool allows you to activate or deactivate any MU (must-use) plugins that are installed - on an individual basis or all at once.
Extends the standard WordPress widgets to be able to run on another blog on the site.
A simple event calendar for WordPress 3.0 MultiSite.
Allow the public to register user accounts on Subsites within a Network (MultiSite) installation.
Ensures logins are always done via SSL on a subdomain of the master domain, but access to custom domains are always over HTTP, to avoid cert errors.
Single sign on (SSO) for a custom domain site, where the admin panel is on an SSL-secured subdomain. For WordPress Multisite.
Adds a custom favicon to all WordPress/MU Blogs and Administration Panels! Originally based of the WordPress Admin Favicon Plugin by John Kolbert!
Switch between the backends of your WPMU blogs with one click
Allows remote login of a proxied MS site.
Easily upgrade your WordPress 3.0 blog into Multi-Site with the click of a single button.
Allows site admins on a multi-site instance (WPMU) to edit users, only when that user belongs to the same site as the admin.
Adds Colorbox/Lightbox functionality to images, grouped by post or page. Works for WordPress and NextGEN galleries. Comes with different themes.