Mindvalley

This shortcode will allow you to include the content from any posts or pages.
Shortcode usage:
<ul>
<li>[mv_include id=’4′] (best for performance)</li>
<li>[mv_include slug=’the-post-slug’]</li>
<li>[mv_include path=’http://www.example.com/parent-page/sub-page/’]</li>
<li>[mv_include path=’parent-page/sub-page’]</li>
</ul>
The plugin also create a special post type that can be used for content that are for inclusion only.

Mindvalley Include Post Content

Creates shortcode [mv_include] to include content from another post/page.

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.

Mindvalley Include Post Content vs Multisite wp_head Code