Sean Fisher

This plugin will hide WordPress Admin (/wp-admin/) when a user isn’t logged in. If a user isn’t logged in and they attempt to access WP Admin directly, they will be unable to and it will return a 404. It can also rename the login URL.
Also, you can add HTTP authentication directly from WP Admin and add custom username/password combinations for the HTTP auth or use the WordPress credentials.
This doesn’t touch any .htaccess files or change the WordPress core files. All the CSS/Images under /wp-admin/ are still accessible, just not the .php ones.
If you enable HTTP authentication, it will add HTTP authentication to the PHP files in /wp-admin/.
To contribute to the development, check out <a href="https://github.com/srtfisher/Lockdown-WPAdmin" rel="nofollow ugc">the GitHub Repository</a>.

Lockdown WP Admin

Lockdown WP Admin conceals the administration and login screen from intruders. It can hide WordPress Admin (/wp-admin/) and and login (/wp-login.

ivansf

WP Auth is a set of tools to make your site new users friendly. It contains shortcodes and options that allows site owners to create registration and login pages that follow their design guidelines instead of having to skin the default WP login page.
Features: 
– Login shortcode that renders a login form. 
– Registration shortcode that renders a registration page. 
– Recover form shortcode. 
– Login/Logout Widget for quick user access. 
– Admin bar hiding options 
– Different button styles 
– Ability to hide /wp-admin and wp-login.php pages.
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Wp Auth

WP Auth is a set of tools to make your site new users friendly. It contains shortcodes and options that allows site owners to create registration and  …

Lockdown WP Admin vs Wp Auth