User Registration’s Extras add-on provides you with the a lot of options for your registration and login forms. You can use the features provided by this add-on to create popup login form and popup registration forms. You can whitelist email domains and you can also use the auto password generation feature. After installing the add-on, you will unlock the following key features.
Brand New Dashboard to see your registration stats
Login and Registration Popup Form
Whitelisted Domain Registration
HoneyPot Spam Protection