Personalize, if not humanize, your posts, adding (CSS) popups containings avatars next to mailto links, as well as next to any word. You can chose avatar images, or let Gravatar chose it for you.
For documentation and tips, please refer to the official plugin page for <a href="http://planetozh.com/blog/my-projects/wordpress-plugin-avatar-gravatar-popup/" title="Avatar Popup" rel="nofollow ugc">Avatar Popup</a>

Ozh' Avatar Popup

Add CSS popups next to mailto links or next to any word. Can be any custom image, and has gravatar support.

Simple plugin to never write again WordPress, Word Press or whatever. One word, capital W and P, it’s WordPress!
For documentation and tips, please refer to the official plugin page for <a href="http://planetozh.com/blog/my-projects/plugin-to-correctly-spell-wordpress-not-word-press/" title="Correctly Spell WordPress" rel="nofollow ugc">Correctly Spell WordPress</a>

Ozh' Correctly Spell WordPress

Simple plugin to never write again Wordpress, Word Press or whatever. One word, capital W and P, it's WordPress!

Ozh' Avatar Popup vs Ozh' Correctly Spell WordPress