Vitor Carvalho

This plugin is DEAD until further development. 
Don’t use it as this can lead your WordPress instalation into problems.
With this plugin you can change wp-admin and wp-login.php to any of your choice. 
You can have <code>http://example.org/login</code> instead of <code>http://example.org/wp-login.php</code> or <code>http://example.org/admin/</code> instead of <code>http://example.org/wp-admin/</code>
You just need to enter into <code>options-permalink.php</code>page and set the variables. 
After the setup wp-login.php and wp-admin path are not anymore available and you should use the newest onews you set.
This works with Multisite Networks. You can set a default value in Options page of Multisite settings section.
Languages available: English, Português, Español, Italiano, Deutsch.

Custom Login and Admin URLs (CLAU)

AVOID TO USE THIS PLUGIN! Change wp-admin and wp-login URL to any of your choice. Security by obscurity!

Yasar Khalifa

This plugin enhances your WordPress login security by allowing you to change the default login URL (wp-login.php) to a custom slug of your choice. It also blocks direct access to wp-login.php and wp-admin for non-logged-in users.
By default, the custom login slug is set to mysecretlogin when the plugin is activated.
If you change or update the custom login slug, you must re-save your permalinks (go to Settings > Permalinks and click “Save Changes”) to ensure the new login URL works correctly.
<h3>Features</h3>
<ul>
<li>Change wp-login.php to a custom slug</li>
<li>Blocks direct access to wp-login.php</li>
<li>Blocks /wp-admin access for non-authenticated users</li>
<li>Fully translation ready</li>
<li>Admin settings to manage slug</li>
<li>Uses WordPress coding and security best practices</li>
</ul>

Change & Hide Login URL

Change or hide the default wp-login.php URL by using a custom slug and block unauthorized access to wp-admin.

Custom Login and Admin URLs (CLAU) vs Change & Hide Login URL