Active Plugins Column in the Network Sites List
Shows how many plugins each site has activated on its own, with the plugin names in a tooltip, in Network Admin > Sites.
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.
Site Count Column in the Network Users List
Adds a column to Network Admin > Users showing how many sites each person belongs to, with the site names in a tooltip.