Janis Elsts

Hide almost any part of the WordPress admin area by using a visual, point-and-click editor. You can hide things from all users or only from specific roles. You can also add your own CSS to the WordPress admin (per role).
This plugin does not have a fixed list of things it can customize. Instead, it displays a live version of the WordPress dashboard and lets you select the parts of the page that you want to hide. You can hide almost any unique element (but see the “Limitations” section below).
Here are a few examples of things you can hide: 
* Dashboard widgets. 
* Post editor meta boxes. 
* Custom fields. 
* Screen options. 
* Individual buttons. 
* Text boxes, checkboxes, dropdown lists and most other form fields.
<h4>Requirements</h4>
<ul>
<li>PHP 5.3 and up.</li>
<li>A modern browser like Firefox, Chrome or IE 9 and up. </li>
</ul>
<h4>Limitations</h4>
<ul>
<li>This is not a security tool. The changes it makes are cosmetic. Users who are familiar with web development can bypass them. Don’t use it for security-critical tasks.</li>
<li>It’s not great at hiding dynamic content like dialog windows, pop-up menus, or any content that changes frequently or depending on the logged-in user.</li>
<li>It’s intended for customizing unique things like specific meta boxes or buttons. If you want to do something like hide all “Edit” links on a page or change the appearance of all “Save Changes” buttons, you’ll have to write the CSS code yourself or use a different plugin.</li>
</ul>

Visual Admin Customizer

Hide almost any part of the WordPress admin by using a visual editor.

pievid

Pievid Custom Login lets you brand the WordPress login screen with your own logo, background color, button color, and an optional welcome message. It is designed for agencies and freelancers who want a clean, white-label login experience without bloat or tracking.
Features:
<ul>
<li>Live preview pane that updates as you edit</li>
<li>Visual color pickers for background and button colors</li>
<li>Logo picker integrated with the WordPress media library</li>
<li>Adjustable logo height</li>
<li>Optional login message rendered above the form</li>
<li>No external requests, no tracking, no analytics</li>
<li>Multisite-aware uninstall cleanup</li>
<li>GPL-licensed</li>
</ul>

Pievid Custom Login

A lightweight, professional login customizer for agencies.

Visual Admin Customizer vs Pievid Custom Login