Jan Štětina

Includes custom HTML/CSS/JS code in the section on every blog in the network.
Very simple, but sometimes useful plugin.
After activation visit Network Admin –> Settings –> Multisite wp_head Code for setup. Nothing else is needed.
Developed for private use, but has perspective for more extensive usage. I can’t guarantee any support in the future nor further development, but it is to be expected. Kindly inform me about bugs, if you find any, or propose new features: <a href="mailto:zaantar@zaantar.eu?subject=[multisite-wphead-code]" rel="nofollow ugc">zaantar@zaantar.eu</a>.

Multisite wp_head Code

Includes custom HTML/CSS/JS code in the  section on every blog in the network.

Bas Matthee

Tweak the performance and automated settings of your WordPress wsite by checking or unchecking the numerous options on the settings page.
Activate the plugin and select the desired settings in the ‘Simple Tweak’ settings page!

LSD Simple Tweak

Tweak the performance and automated settings of your Wordpress wsite by checking or unchecking the numerous options on the settings page.

Multisite wp_head Code vs LSD Simple Tweak