cybio

With this plugin you can cache gravatar images on your server (and they will be delivered with the cache settings of your webserver).
Please report bugs and/or feature-request to our ticket-system: <a href="http://trac.splash.de/glc" rel="nofollow ugc">Bugtracker/Wiki</a>. 
For Support, please use the <a href="http://board.splash.de/forumdisplay.php?f=105" rel="nofollow ugc">forum</a>. 
Latest development news: <a href="http://twitter.com/cybiox9" rel="nofollow ugc">Twitter</a>.
<h3>ToDo</h3>
<ul>
<li>[NEW] cronjob to refresh cached images</li>
</ul>

GravatarLocalCache

Local cache for gravatar images (saves dnsqueries and let you control cache/proxysettings of the images).

mborgelt

51Blocks JSON Schema Creator allows business owners to add schema markup to a single page or entire site without outputting the markup on the actual site. This tool also makes it very easy to validate your markup against Google Structure data testing tool
Schema is the result of collaboration between Google, Bing, Yandex, and Yahoo! to help you provide the information their search engines need to understand your content and provide the best search results possible at this time.

51Blocks JSON Schema Generator

51Blocks JSON Schema Creator allows business owners to add schema markup to a single page or entire site.

GravatarLocalCache vs 51Blocks JSON Schema Generator