Pat Hawks

When Gravatar has no image on file for a user, this plugin takes over and searches for a Facebook, Twitter, or Gmail profile picture to use in it’s place.

Better Avatars

Replace empty Gravatars with profile images from Facebook, Twitter, or Gmail

EverPress

Xaver

Mailster Newsletter Plugin

<blockquote>
This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>
</blockquote>
Uses Gmail to deliver emails for the <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>.
Read the <a href="https://kb.mailster.co/send-your-newsletters-via-gmail?utm_campaign=wporg&utm_source=Gmail&utm_medium=readme" rel="nofollow ugc">Setup Guide</a> to get started.
<h3>Additional Info</h3>
This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Gmail" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>

Mailster Gmail Integration

Does not work! The problem has been known for a long time, but the developer is silent.
Fatal error: Uncaught Error: Call to undefined function Mailster\GuzzleHttp\Psr7\uri_for()
in /home/admin/web/…../public_html/wp-content/plugins/mailster-gmail/vendor/google/auth/src/OAuth2.php on line 1129

Does not work!

Uses Gmail to deliver emails for the Mailster Newsletter Plugin for WordPress.

Better Avatars vs Mailster Gmail Integration