Nick Halsey

Live preview in the customizer allows you to see what plugins do to your site instantly. This experimental plugin brings the ability to activate and deactivate plugins from within the customizer. Plugin installation and updates could be a potential future phase depending on the success of this experiment.
Unfortunately, the customizer preview cannot currently reflect changes to the active plugins list. Additionally, plugins are not sandboxed – broken plugins activated from here could break your site. Use this plugin with caution. However, changes are not published to your live site until you “Save and Publish,” and the plugin manager does functionally activate and deactivate plugins. Preview functionality requires hooking into WordPress before plugins are loaded (for obvious reasons), which isn’t possible to do within a plugin.
See https://core.trac.wordpress.org/ticket/40451 for additional discussion.

Customize Plugin Manager

Live preview in the customizer allows you to see what plugins do to your site instantly. This experimental plugin brings the ability to activate and d …

binarymoon

Bartosz Gadomski

Teydea Studio

A simple way to customise the login screen on your WordPress install. There are a number of advantages to using this plugin:
<ol>
<li>Using a plugin means the changes stay when you upgrade</li>
<li>It’s an easy way to add a little polish to your freelance web design jobs</li>
</ol>

Custom Login

Not too much, not to little, just right.  Allows for custom logo, font and button, and a little extra CSS if needed.  Based on the size of your logo you will need to adjust the background position and/or margins of the #login but with a few tweaks it looks great.  

goldilocks

Customise the WordPress login box quickly and easily

Customize Plugin Manager vs Custom Login