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 .

Jeff Sherk

Julien Laumond

This plugin has the following great features:
<ul>
<li>
Auto-login: When a new user registers, this will automatically log them in right away.
</li>
<li>
Redirect: Choose the web page you want them to be redirected too after they register and are auto-logged in.
</li>
<li>
Independent options to add Password field to new user registration form, so users can create their password during registration instead of having to wait for an email and clicking the link in the email.
</li>
<li>
Independent options to add First Name field and/or Last Name field to registration form.
</li>
<li>
Independent option to disable the annoying admin notification emails about new user registrations. User will still receive their email about how to setup their password.
</li>
<li>
Independent option to disable the annoying admin notification emails about users lost/changed password. User will still receive their email about how to reset their password.
</li>
</ul>

Auto Login New User After Registration

Automatically login new user right after they have registered. Add Password field to registration form. Disable admin notification emails of new user  …

Wonder Login vs Auto Login New User After Registration