Allow Network Signups Only From Certain Email Domains
Rejects user signups on the network unless the email address belongs to one of your domains, such as a school or company network.
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.
Fix Old Subsite URLs After Domain Mapping
Rewrites links and image URLs that still point at a site's old network address (like example.com/shop/) to its mapped domain when content is displayed.
Mapped Domain Column in the Network Sites List
Shows each site's public address next to its network address in Network Admin > Sites and flags sites whose Home and Site URLs do not match, a common domain-mapping mistake.