WP3.1 multisite "mu-plugin" that allows you to add a user to all sites or no sites. Just drop in mu-plugins.
Add-on to WPML and to WPMU Sitewide tags plugins. Will propagate WPML language properties to the Network wide aggregation blog.
Adds the ability to have different themes available to different NETWORKS in a multisite atmoshpere.
Add site specific CSS to each blog individually, instead of changing your theme or using a million child themes.
Clone site for WordPress 3.0 and above.
Remove All Dashboard Widgets In Single WP, Or Multi-Site!
Plugin Commander is a plugin management plugin for multi-site mode, which allows further control on network-activated plugins.
Share WordPress users and assign roles between multiple blogs without using wordpress MU or multi-site.
Allows blogs to be created on multiple domain names while maintaining only one main site for all domain names.