Henry Wright

<p>This WordPress plugin will generate an identicon for each user. Each identicon is highly likely to be unique.</p>
<h3>Requirements</h3>
<p>You will need to compile PHP with the GD library for this plugin to work.</p>


Identicons

mdiamondstone

<p>authorGrid is a sidebar widget that displays the avatar of any author on your blog with at least one published post in grid form. You<br />
can set how large the avatar should be, how many columns (or rows) you’d like in the grid, and the display title of the widget.</p>


Author Grid

Sidebar widget that displays the avatar of all of the authors on your blog in grid form.

Identicons vs Author Grid