Slim version of Jetpack unlinked from WordPress.com :) Supercharge your self-hosted wp site even you're NOT WP.COM users.
Slimpack — Lightweight Jetpack. Super-fast performance without modules that requires contracting WordPress.com.
A bunch of groovy enhancements for using Gravatars on your site.
This plugin enables Gravatar Hovercards in Self Hosted WordPress Blogs. Code by Ottopress, Pluginized By Abhik.
Show a pop-up business card of your users' gravatar profiles in comments.
Gravatar Hovercards shows the commentator's profile information from Gravatar on hovering the cursor on that commentator's gravatar.
This plugin brings Hovercard popups for your commenters via Gravatar
WordPress Hovercards is a lightweight plugin that integrates hovercards for your WordPress posts & pages.