FL3R

This plugin provides a large randomly assembled avatar for each user based on their email address. When a user comments on the site, the plugin generates a unique avatar based on his email. There are an impressive number of avatars that can be generated, and it increases at each update of the plugin!
<h3>Donate</h3>
If you like this plugin, you consider making a small donation. Thanks. https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=WFLPUGCW9EJVJ
<h3>My plugins</h3>
FL3R FeelBox: https://wordpress.org/plugins/fl3r-feelbox/
FL3R User Agent Comments: https://wordpress.org/plugins/fl3r-user-agent-comments/
FL3R Randavatar: https://wordpress.org/plugins/fl3r-randavatar/

FL3R Randavatar

Creates a unique avatar for each commenter based on email address, with godzillion of generated avatars!

FolioVision

There’s one problem with Gravatars. They are very slow to load. Each page with comments on them makes one call per comment to the Gravatar server. While a single call takes only a 100ms, on a page with hundreds of comments, we are talking about major slowdowns. Page loads can take 20 seconds and more.
This plugin solves this problem by:
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caching gravatars with WordPress cron job..
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caching gravatars on comment submission
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maintaining a single copy of the default gravatar instead of downloading it again and again for all the email addresses with no gravatar associtated
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<a href="http://foliovision.com/seo-tools/wordpress/plugins/fv-gravatar-cache/installation" rel="nofollow ugc">Installation guide</a>
<a href="http://foliovision.com/seo-tools/wordpress/plugins/fv-gravatar-cache" rel="nofollow ugc">Support and more information</a>

FV Gravatar Cache

I deactivated plugin but still contains elements in Database

Database Junk

Speeds up your website by making sure the gravatars are stored on your website and not loading from the gravatar server.

FL3R Randavatar vs FV Gravatar Cache