dubhunter

WordPress’s themes are absolutly amazing, except you are not able to theme the login pages very well. 
DBD Login Style is a light weight plugin that will allow you full theme control over the login pages. 
It also offers additional DIV tag creation for custom messages.
Some Features:
<ul>
<li>Specify CSS style sheet for login pages.</li>
<li>Change the URL and TITLE of the header link.</li>
<li>Add specific messages to the different login pages (Login, Registration, Forgot Password)</li>
<li>Change various error messages on login and registration pages.</li>
</ul>

DBD Login Style

Add style to your login page!! This plugin enables you to specify a style sheet to be used on the login page.

Access Keys

AccessPress Custom CSS is a FREE plugin to add your own custom css to your site that will override plugins and theme’s default stylesheets. With this plugin you can put custom css code without editing your theme and/or your plugins files (really useful in case of any theme/plugin update). This is very easy to use plugin.
<h4>Features:</h4>
<ul>
<li>Add your custom css to a site.</li>
<li>Syntax Highlighter supports(by CodeMirror) color and tab support for write a good css code.</li>
<li>Lightweight – Installs in seconds.</li>
<li>User friendly – very easy to configure and setup.</li>
<li>Super support – get support via email/support forum/online chat.</li>
</ul>
AccessPress Custom CSS works best with every WordPress theme. Its even more remarkable when used with popular themes like VMagazine and AccessPress Parallax.
<h4>Some Useful Links</h4>
<ul>
<li>Support Email: support@accesspressthemes.com</li>
<li>Support Forum Link: http://accesspressthemes.com/support/</li>
<li>Youtube channel link: https://www.youtube.com/watch?v=TjZNcVG3fDE</li>
<li>Facebook link: https://www.facebook.com/AccessPressThemes</li>
</ul>

DBD Login Style vs AccessPress Custom CSS