Matt Rude

MDR Webmaster Tools provides many small necessary functions to WordPress when for managing your site with <a href="https://www.google.com/webmasters/tools/" rel="nofollow ugc">Google</a>, <a href="https://siteexplorer.search.yahoo.com" rel="nofollow ugc">Yahoo</a>, & <a href="http://www.bing.com/toolbox/webmaster" rel="nofollow ugc">Bing’s</a> webmaster tools sites. The plugin adds the following functions to WordPress
<ul>
<li>Dynamic Sitemap</li>
<li>Ability to modify your robots.txt file.</li>
<li>Site verification scripts for Google, Yahoo, & Bing.</li>
<li>Google Analytics Tracking Script for registered sites.</li>
</ul>
This plugin will create a sitemap for your WordPress site (http://example.com/sitemap.xml). No files are stored on your disk, the sitemap.xml file is generate as needed, like your feeds. No UI to speak of, just drop in place and your good to go.
This plugin is fully translatable with the full POT file included.
For Support, please contact me via the <a href="https://wordpress.org/tags/mdr-webmaster-tools?forum_id=10#postform" rel="ugc">WordPress Forums</a>, if you find a bug, please create a ticket on the plugins <a href="https://github.com/mattrude/wp-plugin-webmaster-tools/issues" rel="nofollow ugc">Github Issues</a> page.
See Tools -> Webmaster Tools

MDR Webmaster Tools

Provides Webmaster site verification scripts for Google, Yahoo, & Bing. Plugin also provides Google Analytics Tracking Script and sitemap support.

Processby

The plugin allows you to create and edit the robots.txt file on your site.
<h4>Features</h4>
<ul>
<li>Works with multisite network on Subdomains;</li>
<li>An example of the correct file for WordPress;</li>
<li>Works out of the box;</li>
<li>Totally Free.</li>
</ul>

Robots.txt Editor

Lightweight and perfect for multisite installations.

But in documentation need to say where the option/editor is installed (Settings > Read options).

MDR Webmaster Tools vs Robots.txt Editor