Anton Paramonov

Pretty simple plugin for disable:
<ul>
<li>the XML-RPC on a WordPress site running 3.5 or above</li>
<li>new emoji functionality in WordPress 4.2</li>
<li>Posts and Comments general feeds</li>
</ul>
And remove:
<ul>
<li>WordPress genarator meta tag from HTML source page</li>
<li>link to wlwmanifest file from HTML source page (Windows Live Writer)</li>
<li>link to RSD EditURI from HTML source page</li>
<li>X-Pingback from HTTP headers and pingback_url in HTML source page</li>
<li>shortlink from HTTP headers and HTML source page</li>
</ul>
Translated on English, Russian and Ukraine languages.

YaBlog

Allows administrators to globally disable XML-RPC, new emoji functionality in WordPress 4.2, wp generator, wlwmanifest, RSD EditURI and rss/feeds on t …

Brad Williams

This plugin lets you create category mappings allowing for one top-level blog to act as a portal for your global community of WPMU blogs. Category postings are aggregated based on the mappings and displayed on the top-level blog.
Features:
<pre><code>* Map multiple top-level categories
* Built-in sidebar widget to display all categories
* WordPress MU 2.7 approved!
</code></pre>
<h3>Plugin Support</h3>
<a href="http://webdevstudios.com/support/wordpress-plugins/" title="WordPress Plugins and Support" rel="nofollow ugc">WordPress MU Category Mapping Plugin</a>

WordPress MU Category Mapping Plugin

Plugin links categories network wide to provide one top-level blog to act as a portal for your global community of blogs

YaBlog vs WordPress MU Category Mapping Plugin