Jeet Vaja

JV Login Design Styler Lite lets you personalize your WordPress login page in just a few clicks. 
Change the logo, background color, and button color — all from a simple settings panel.
Features:
✅ Upload / set a custom logo 
✅ Set login page background color 
✅ Change login button color 
✅ Lightweight – no builder, no bloat 
✅ Live preview–friendly styling 
✅ No coding required
Perfect for bloggers, developers, and agencies who want a branded login page.

JV Login Design Styler Lite

Customize your WordPress login page with your own logo, background color, and button styles — easily and without coding!

Alimir

Blue Login Style is a tiny WordPress plugin that allows you to customize your login page with beautiful themes. Its features: ability to add message, change the login logo, ability to set login, logout and register redirect links and many more… 
Screenshots are available in <a href="http://preview.alimir.ir/wordpress-blue-login-style/" rel="nofollow ugc">Here</a>
<h4>Features</h4>
<ul>
<li>Ability to choose nice themes with great options.</li>
<li>Ability to add message in your login page.</li>
<li>Add a custom logo of your wordPress blog as piece of cake.</li>
<li>Add custom background image.</li>
<li>Ability to set <code>login</code>, <code>logout</code> and <code>register</code> redirect links.</li>
<li>Simple configuration panel.</li>
<li>And so on…</li>
</ul>
<h4>Plugin Author</h4>
Website: <a href="http://about.alimir.ir" rel="nofollow ugc">Ali Mirzaei</a> 
Follow on <a href="https://www.facebook.com/alimir.ir" rel="nofollow ugc">Facebook</a> 
You can catch catch me on twitter as @alimirir

Blue Login Style

I've been using Theme My Login for years, but it is no longer being supported or updated, and it is broken for WP 4.3 (password resets fail).
This is a nice, simple to use alternative. Has some nice default themes. Upload a custom image (recommend 320px wide), pick a theme, and you're all set. Add some custom text to the lead-in box if you want.
If you want to spend the effort, you can completely customize with your own CSS.



Nice, simple

Blue Login Style is a tiny plugin which allows to customize your wp-login theme easily with a click.

JV Login Design Styler Lite vs Blue Login Style