Jacques Malgrange

This plugin adds a simple widget that allows you to display an email form and a submit button.
<ul>
<li>You have the options to choose to recommend the site or the current page.</li>
<li>The mail subject and content can be changed.</li>
<li>You can limit the number of recommendation sended by user a day.</li>
</ul>
The widget is only displayed if the user is connected.

Recommend by mail widget

Recommend the site or the current page to a friend by mail.

marubon

SNS Count Cache is a plugin which helps you to shorten page loading time displaying share and follower counts through the use of cache mechanism.
Notice: 
In the upgrade from Ver. 0.11.1 or below, Reregistration of information such as client ID, client secret, and access token is needed in the setting page.
The plugin gets share counts for the following SNS and caches these counts in the background.
<ul>
<li>Twitter</li>
<li>Facebook</li>
<li>Pocket</li>
<li>Pinterest</li>
<li>Linkedin</li>
<li>Hatena Bookmark</li>
</ul>
Note: You can select alternative Twitter API for share count retrieval from the following alternatives.
<ul>
<li>widgetoon.js & count.jsoon</li>
<li>OpenShareCount</li>
<li>TwitCount</li>
</ul>
The plugin also caches follower counts for the following SNS in the same way.
<ul>
<li>Twitter</li>
<li>Facebook</li>
<li>Feedly</li>
<li>Instagram</li>
<li>OneSignal</li>
<li>Push7</li>
</ul>
The share and follower counts can be retrieved quickly not through network but through the cache using given functions.
The following shows functions to get share count from the cache:
<ul>
<li>scc_get_share_twitter()</li>
<li>scc_get_share_facebook()</li>
<li>scc_get_share_pocket()</li>
<li>scc_get_share_pinterest()</li>
<li>scc_get_share_linkedin()</li>
<li>scc_get_share_hatebu()</li>
<li>scc_get_share_total()</li>
</ul>
The following shows functions to get follower count from the cache:
<ul>
<li>scc_get_follow_feedly()</li>
<li>scc_get_follow_twitter()</li>
<li>scc_get_follow_facebook()</li>
<li>scc_get_follow_instagram()</li>
<li>scc_get_follow_onesignal()</li>
<li>scc_get_follow_push7()</li>
</ul>
The following describes meta keys to get share count from custom field.
<ul>
<li>scc_share_count_twitter</li>
<li>scc_share_count_facebook</li>
<li>scc_share_count_pocket</li>
<li>scc_share_count_pinterest</li>
<li>scc_share_count_linkedin</li>
<li>scc_share_count_hatebu</li>
<li>scc_share_count_total</li>
</ul>
The following describes meta keys to get delta of share count from custom field.
<ul>
<li>scc_share_delta_twitter</li>
<li>scc_share_delta_facebook</li>
<li>scc_share_delta_pocket</li>
<li>scc_share_delta_pinterest</li>
<li>scc_share_delta_linkedin</li>
<li>scc_share_delta_hatebu</li>
<li>scc_share_delta_total</li>
</ul>
<h3>Arbitrary section</h3>

SNS Count Cache

This plugin gets and caches SNS counts in the background, and help you to shorten page loading time through the use of cache mechanism.

Recommend by mail widget vs SNS Count Cache