coderguy

This plugin adds Google Analytics tracking code to all WordPress pages. If multisite/network mode is enabled, this 
tracking code will be the same on all sites, which was the main purpose for authoring it.
It’s very basic.
This plugin includes a settings page that allows users to enable or disable the tracking code, enter their account ID, 
and provide a single domain, which is used for aggregating statistics across multiple sub-domains. For WordPress 
Network installations, this page is located under the Settings menu of the Network administration area. For normal 
WordPress installations, this page is located under the Settings menu of the standard administration area.
I needed this functionality but couldn’t find it elsewhere, so I decided to write a plugin. I’m totally open to improving 
this plugin as well so please contact me with feature requests or bug reports.

Sitewide Google Analytics

This plugin adds Google Analytics tracking code to all WordPress pages. In network/multisite mode, this tracking code will be the same on all sites.

Adadaa

This plugin creates four (4) seperate RSS 2.0 feeds from posts, comments, pages, and one combined [posts & pages] across all blogs on your site.
Works both on WPMS upto 4.9.20
This will skip the first comment and page of a blog; also will not include private, spam, mature and deleted blogs.
Both Subdirectory and VHOST installations are now supported. Thanks to DaryL.
Features:
<ul>
<li>Generates sitewide combined [posts & pages] feed</li>
<li>Generates sitewide posts feed</li>
<li>Generates sitewide comments feed</li>
<li>Generates sitewide pages feed</li>
<li>Client-side caching via ETag headers</li>
<li>Admin screen to configure options</li>
<li>Compliance with xhtml and xml standards & many more</li>
</ul>
For more explanation and to leave any suggestions to improve or bugs, please visit on my blog : <a href="http://1uthavi.adadaa.com/ada-wpmu-sitewide-feed-plugin/" rel="nofollow ugc">Ada WPMS Sitewide Feed</a>
<h3>Usage</h3>
Compatible with WP Multi-Network plugin . You can have different blog ID than 1 to trigger the full feed.
<h3>To Do</h3>
<ul>
<li>Comply fully for language translation</li>
<li>Exclude blogs by ID</li>
<li>Enable/disable individual sitewide feeds</li>
<li>Option to include the blog title in the post title shown in the feed</li>
<li>Consider changing the function ada_get_avatar_url() to use the core hook get_avatar(). So it can work with WPMUDEV’s Avatars for Multisite.</li>
<li>Option to exclude by post types</li>
</ul>

Ada WPMS Sitewide Feed

Creates four rss 2.0 feeds showing recent posts, comments, pages, and one combined [posts and pages] from all blogs.  Works both on WPMS, and WPMU

Sitewide Google Analytics vs Ada WPMS Sitewide Feed