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

krut1

Use your personal SMTP mail server (GMAIL, YAHOO, YANDEX etc.) to send emails in your WordPress system.
The plugin allows you to set up SMTP mails to your blog in 30 seconds. All emails will be sent through your configured server.
The plugin is translated into russian, german and english.
SMTP MAILER WP works fine in WordPress Multisite too and supports global configuration (networkwide active) and per blog (if it is activated in the blog).

SMTP MAILER WP

Use your personal SMTP mail server (GMAIL, YAHOO etc.) to send emails in your WordPress system.

Better Avatars vs SMTP MAILER WP