Minimum Site Name Length for Signups
Requires new site names to be at least a set number of characters (WordPress only asks for four), cutting down on throwaway and squatted names.
Snippet Library
Multisite snippets for WordPress
Snippets for WordPress Multisite networks: network-wide settings, new site defaults, super admin tools and cross-site tweaks. For network administrators who manage many sites from one install.
Reserve Site Names on the Network
Blocks signups for site names you want to keep, such as shop, support or your brand names, on top of WordPress's built-in reserved list.