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.

Skip the login form: every visitor automatically auths as an admin. FOR ‘LOCALHOST’ TEST SITES only, obviously, like when designing a plugin or a theme and testing it across various browsers.
For a hassle free integration, drop the plugin file into <code>wp-content/mu-plugins</code> (create the directory if needed) and it will be automatically activated.
For live blogs, see <a href="https://wordpress.org/extend/plugins/always-remember-me/" rel="ugc">Always Remember Me</a>
<h3>Support</h3>
On <a href="https://github.com/ozh/no-login" rel="nofollow ugc">Github</a>. I don’t read WordPress support forums.

No Login

Skip the login form and always auth as admin. FOR TEST SITES.

Ozh' Avatar Popup vs No Login