Shared Navigation Menu From the Main Site
Adds a [wpide_network_menu] shortcode that displays a menu from the main site on any site in the network, so one menu can be maintained in one place.
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.