frankkoenen

This plugin provides a complete replacement for the standard WP login, registration and lost password interfaces. 
Provides a password recovery system, adds password expired feature, integrates with Really Simple Captcha and provides optional invitation code to register.
Simply download and install the plugin, activate it.
Customizable to integrate with LDAP-LPRM plugin ( <a href="https://wordpress.org/extend/plugins/ldap-login-password-and-role-manager/" rel="ugc">https://wordpress.org/extend/plugins/ldap-login-password-and-role-manager/</a>).
Captcha integration with Really Simple CAPTCHA ( <a href="https://wordpress.org/extend/plugins/really-simple-captcha/" rel="ugc">https://wordpress.org/extend/plugins/really-simple-captcha/</a> )
Configurations include assigning page or post ID to provide content as wrapper to the login, registration and lost password forms.
Configure one or more invitations codes to force new regristraints to supply the code to register.
<h3>Features</h3>
<ul>
<li>CSS ready for 100% customization to customize the cleaned forms for integration with your theme and the rest of your site.</li>
<li>Include or exclude active theme Javascript and CSS resources.</li>
<li>Replacement Login form.</li>
<li>Replacement for the Registration form.</li>
<li>Replacement for the Lost Password form.</li>
<li>Uses the standard WP Password recovery interface.</li>
<li>Optionally enable password expirary management.</li>
<li>Optionally enable registration invitation code verification.</li>
<li>Full system logging via syslog.</li>
<li>Fully customizable expired password reset and password recovery and user registration procedures.</li>
<li>All form control pages are customizable via blog-posts; assign posts for display with the specific forms as desired.</li>
<li>Can be AJAX enabled to embed the forms on any page, using shortcodes</li>
</ul>

Plugin Name: login_register

Provides a replacement for login and register and lost password and provides feature for password expiration and optional invitation codes.

Fidgety Lizard

Kona Macphee

PLEASE NOTE: AS OF WP 5.7, THIS PLUGIN IS NO LONGER SUPPORTED.
Since WordPress 4.3, new users are no longer sent their passwords directly by email. Instead, they are sent a message containing a link to the Reset Password page, where they can choose their own password. Additionally, the Reset Password page now appears with a strong password already suggested in the “New password” field.
This plugin removes the suggested password from the Reset Password page, because often users assume that their password has already been set to this new suggested password (leading to repeated password reset requests, frustration and unnecessary helpdesk queries.)

No Suggested Password

AS OF WP 5.7, THIS PLUGIN IS NO LONGER SUPPORTED.
Clears the initial suggested password on the WP 4.3+ password reset page.

Plugin Name: login_register vs No Suggested Password