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Ammaletu

Avatars from Gravatar.com are great, but they come with certain privacy implications. You as site admin may already know this, but your visitors and users probably don’t. Avatar Privacy can help to improve the privacy situation by making some subtle changes to the way avatars are displayed on your site.
The plugin works without changing your theme files (for reasonably modern themes), and it does support multisite installations. Please note that the plugin does not provide an options page of its own, it rather adds to the existing discussion settings page.
<h4>Features</h4>
The plugin’s features summed up:
<ul>
<li>Self-uploaded avatars for users (and custom default images), hosted on your server.</li>
<li>Users and commenters explicitly opt-in before using gravatars.</li>
<li>Gravatar caching to ensure the privacy of your website visitors.</li>
<li>Don’t publish weakly encrypted e-mail addresses of comment authors.</li>
</ul>
A more detailed examination of the <a href="https://code.mundschenk.at/avatar-privacy/reasons/" rel="nofollow ugc">reasons for using Avatar Privacy</a> can be found on the plugin homepage.
<h4>WP-CLI Commands</h4>
Avatar Privacy includes the following <a href="https://wp-cli.org" rel="nofollow ugc">WP-CLI</a> commands:
<ul>
<li><code>wp avatar-privacy db show</code>: Show information about the custom database table(s).</li>
<li><code>wp avatar-privacy db list</code>: List entries in the custom database table(s).</li>
<li><code>wp avatar-privacy db create</code>: Create the custom database table.</li>
<li><code>wp avatar-privacy db upgrade</code>: Upgrade the structure of the custom database table.</li>
<li><code>wp avatar-privacy default get-custom-default-avatar</code>: Show information about the custom default avatar for the site.</li>
<li><code>wp avatar-privacy default set-custom-default-avatar</code>: Set a custom default avatar for the site.</li>
<li><code>wp avatar-privacy default delete-custom-default-avatar</code>: Delete the custom default avatar for the site.</li>
<li><code>wp avatar-privacy cron list</code>: List active cron jobs created by the plugin.</li>
<li><code>wp avatar-privacy cron delete</code>: Delete cron jobs created by the plugin.</li>
<li><code>wp avatar-privacy user set-local-avatar</code>: Set a local avatar image for a user.</li>
<li><code>wp avatar-privacy user delete-local-avatar</code>: Delete the local avatar image for a user.</li>
<li><code>wp avatar-privacy uninstall</code>: Remove data added by Avatar Privacy.</li>
</ul>
<h4>Feedback</h4>
Please report any problems with the plugin, I’ll do my best to sort things out. You can use the contact form on <a href="https://code.mundschenk.at/avatar-privacy/" rel="nofollow ugc">my code site</a> or <a href="https://wordpress.org/support/plugin/avatar-privacy" rel="ugc">create a topic in the support forum</a>. You can contact me in German or English.
<h4>Credits</h4>
Avatar Privacy is based on the original plugin by <a href="http://code.freudendahl.net/projekte/avatar-privacy/" rel="nofollow ugc">Johannes Freudendahl</a>. The new release also includes work by several other people:
<ul>
<li>Daniel Mester Pirttijärvi (<a href="https://jdenticon.com" rel="nofollow ugc">Jdenticon</a>),</li>
<li>Shamus Young (<a href="https://shamusyoung.com/twentysidedtale/?p=1462"" rel="nofollow ugc">Wavatars</a>),</li>
<li>Andreas Gohr (the original <a href="https://www.splitbrain.org/blog/2007-01/20_monsterid_as_gravatar_fallback" rel="nofollow ugc">MonsterID</a> and <a href="https://github.com/splitbrain/php-ringicon" rel="nofollow ugc">RingIcon</a>),</li>
<li>Scott Sherrill-Mix & Katherine Garner (the <a href="http://scott.sherrillmix.com/blog/blogger/wp_monsterid-update-hand-drawn-monsters/" rel="nofollow ugc">hand-drawn monster update</a>)</li>
<li>Benjamin Laugueux, Grummfy, Lucas Michot & Arjen van der Meijden (<a href="https://github.com/yzalis/Identicon" rel="nofollow ugc">Identicon</a>),</li>
<li>David Revoy (<a href="https://www.davidrevoy.com/article720/bird-avatar-generator" rel="nofollow ugc">Bird</a> and <a href="https://www.davidrevoy.com/article591/cat-avatar-generator" rel="nofollow ugc">Cat Avatars</a>),</li>
<li>Zikri Kader, Colin Davis & Nimiq (<a href="https://robohash.org" rel="nofollow ugc">RoboHash</a>), and</li>
<li>Johanna Amann (the Avatar Privacy icon).</li>
</ul>

Avatar Privacy

Enhances the privacy of your users and visitors with gravatar opt-in and local avatars.

Maruti Mohanty

As the name suggests, this plugin allows you to use the social profile picture as your WordPress Avatar. 
You can see more, on how to install and use the plugin here in this blog <a href="http://www.sourcexpress.com/wp-social-avatar/" rel="nofollow ugc">WP Social Avatar</a>
Why this plugin?
If you are me, who gets bore of using the same gravatar for few days or months then this plugin is totally for you. 
This plugin provides option to the user to use Social media like Facebook and Google plus profile pictures as the gravatar instead of the one from en.gravatar.com.
WP Social Avatar Settings:
After activating the plugin admin will see WP Avatar, under Users menu. Here the admin can set the minimum role/capabilities required to avail this feature.
The allowed users will see the available options in their Your Profile sub menu under Users menu.
For the first version I only have two social options available, Facebook and Google plus. You need to add either the Facebook user ID(numeric) or Google plus id in the corresponding fields. <a href="http://findmyfacebookid.com/" rel="nofollow ugc">You can find your facebook user id here</a>
Once done with the above, check the social profile picture you want to use as the gravatar and click Update Profile and you are done.
After saving the profile you can see all the gravatars in the site has been replaced by the respective social media profile picture.
With this you will get rid of the boredom of looking at the same gravatar all the time. With the change in the respective social media profile picture, the gravatar of your site will also change.
With Version 1.4 Cache functionality is implemented for Google Plus avatar, this optimizes the functionality. I have added a clear cache button for Google plus, anytime you upload a new profile picture in your Google Plus account click the “clear cache” button and you will get the latest image else the code will make a request and pull the latest image after every 48 hours. This has been done to make the Google Plus functionality faster.

WP Social Avatar

This plugin gives the users the option to use their social profile picture as the WordPress Avatar

Avatar Privacy vs WP Social Avatar