rtCamp

Pradeep Sonawane

Gmail Like Gravatar Fallback plugin converts default WordPress Gravatar into Gmail App like Gravatar which shows the initial letter of the user in a random background color.
<ul>
<li>You can also add your styling to your stylesheet to customize the default gravatar after activating the plugin. Once the plugin is installed, it detects the user gravatars which are not set and are default, then they will be converted to SQUARE ICONS with First Letter of User’s Name.</li>
<li>This plugin also keeps the default gravatar settings, so once plugin is deactivated, old setting will be applied again.</li>
<li>This will show Gmail APP like gravatars in Comments list and Users / Members list.</li>
<li>This plugin has no settings, it just uses converts the default Gravatars using jQuery.</li>
</ul>
Requirements: 
1. In the HTML markup, the Author Name should be sibling of Author Gravatar. 
2. The Author name should have “fn” class. <a href="http://impradeep.in/gmail-like-gravatar-fallback-wordpress-plugin" rel="nofollow ugc"></a>To know more click here…
Please note: Our default WordPress comments section already shows markup in the link above. 
So if want to use these Gmail like Gravatar Fallback in some other custom templates, then you can reform the structure to look like the above.

Gmail Like Gravatar Fallback

Gmail Like Gravatar Fallback plugin converts default Gravatar into Gmail App like Gravatar.

Jason Coleman

Paid Memberships Pro

Jared Atchison

<h4>Add an avatar upload field on frontend pages and Edit Profile screen so users can add a custom profile picture.</h4>
Community and Membership sites on WordPress use this plugin as a lightweight solution for custom user avatars. The plugin is compatible with bbPress, as well as many popular plugins with frontend user registration and profile management features.
Admins can upload a user’s avatar on the Edit User admin screen.
Basic User Avatars also supports front-end avatar management for sites that want to keep users out of the dashboard. To use this feature, add the shortcode <code>[basic-user-avatars]</code> to any page in your WordPress site. We recommended placing this shortcode on another logged-in account type page, such as the WooCommerce My Account page, the Membership Account page, or any other front-end profile edit form.
The Avatar Upload form is automatically added to the bbPress User Profile > Edit frontend page.
If you do not want your users to be able to update their avatar, navigate to Settings > Discussion and locate the “Local Avatar Permissions” setting. Check this box to only allow users with file upload capabilities to upload local avatars (Author role and above).
<h4>Seamlessly Migrate from WP User Avatar Plugin</h4>
Version 1.0.5 includes a feature to automatically convert avatars formerly loaded through the WP User Avatar plugin. This means that you can disable WP User Avatar, activate Basic User Avatars, and have a seamless transition for existing avatars in your site. Be sure to update any avatar upload form that used the <code>[avatar_upload]</code> shortcode to use the shortcode: <code>[basic-user-avatars]</code>.

Basic User Avatars

it may have been around for a while but this plugin still works well

still works with WP4.9.1

Add an avatar upload field on frontend pages and Edit Profile screen so users can add a custom profile picture.

Gmail Like Gravatar Fallback vs Basic User Avatars