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).

Robin Phillips

This plugin was originally written for authors, but may be useful for others that link to stores such as Amazon, Apple, and Kobo.
It will automatically edit links to various sites so that the user is directed to their local site. It will work on existing links and new ones. Simply add links to your site as usual, and they will be rewritten on the fly to send your visitors to their local site.
In addition, some tidying up of links is performed to remove extraneous junk. If you have affiliate codes, the relevant code will be added to that store’s links.
Changes are only made in the user’s browser. WordPress posts and pages are not changed, so if the plugin is deactivated or removed, they will return to their previous state.
Currently Supported Stores:
<ul>
<li>Amazon</li>
<li>Apple Books</li>
<li>Apple iTunes (audiobooks)</li>
<li>Kobo</li>
<li>Alibris</li>
<li>Google Play</li>
<li>AbeBooks</li>
<li>Barnes & Noble</li>
<li>Bookshop.org</li>
<li>OneBookShelf sites (DriveThruFiction, DriveThruCards, DriveThruComics, DriveThruRPG, Wargame Vault)</li>
<li>Smashwords</li>
</ul>
From version 4.1, Amazon Attribution links are supported. If a link has Amazon Attribution tags, they will be retained. For more information about Amazon Attribution, see: https://advertising.amazon.com/help?#GJXTJCLK4WTWTQWU

Local Links

Alter vendor links so that they go to the user's local store, and optionally add affiliate codes. Some functions require the GeoIP Detection plugin.

GravatarLocalCache vs Local Links