Shashank Sahu

Easy Login and Registration features with popup.
Features:
<ol>
<li>Easy to Login and Register (as modal)</li>
<li>Well customizable</li>
<li>100% responsive</li>
<li>provides sample login and registration pages</li>
<li>Compatible with all themes</li>
<li>Tested with latest WP version</li>
<li>Possible to replace wp-login.php with a custom “Login”, and “Registration” pages</li>
<li>provides after-login/registration/logout actions</li>
</ol>
Customization options:
<ol>
<li>Add plugin’s classes to your buttons to attach modal.</li>
<li>Select pages for ‘After-Login actions’ and ‘After-Logout actions’.</li>
</ol>

Wonder Login

Easy to implement login and registration by ajax .

Firdaus Zahari

This plugin allows users to set their passwords during the registration process. Once activated, a password field will appear on the registration field which uses the same functionality as the password field you get when you’re resetting your password.
The email notification sent to the new user is also modified to indicate a successful password set.

FS Registration Password

Allow users to set their own password during site registration.

Wonder Login vs FS Registration Password