Vast HTML

<p>This is a full featured plugin to help you edit your login just the way you want it. Lets you use or block the original wordpress<br />
css (the first plugin to do this). Comes with one pre made style you can use or deactivate.<br />
Very easy to create your own style using the style tags givin in the plugin.<br />
Please visit  http://vasthtml.com/js/login-xchange-plugin/  for usage instructions.</p>


Login XChange

This plugin will let you change the css of your login and register pages.

Javier Prieto

<p>Custom Admin Login is a free plugin that allows you to customize the WordPress login page.</p>
<h4>Features</h4>
<p>You can:<br />
* Set the color and/or image background.<br />
* Replaces the WordPress logo for a custon image contained in a area 320 x 84 pixels (if it’s bigger, it’s scaled to fit).<br />
* Set URL and caption of the logo image.<br />
* Set font color outside of login form.</p>
<h3>Contribute</h3>
<p>Have a bug? Please create an issue on GitHub <a href="https://github.com/jprieton/custom-admin-login/issues" rel="nofollow ugc">here</a></p>


Custom Admin Login

Allows you to customize the background, logo, font color, url and caption on the WordPress login page.

Login XChange vs Custom Admin Login