Slimpack — Lightweight Jetpack. Super-fast performance without modules that requires contracting WordPress.com.
Show a pop-up business card of your users' gravatar profiles in comments.
Slim version of Jetpack unlinked from WordPress.com :) Supercharge your self-hosted wp site even you're NOT WP.COM users.
WordPress Hovercards is a lightweight plugin that integrates hovercards for your WordPress posts & pages.
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
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.