Powerful form manager for WPBakery Page Builder allows you to create and manage form very easily. Literally within minutes you can build complex forms as Booking form or just a simple Contact form or Login/Register form form with drag and drop form element without touching a single line of code.
With plugin, you can customize your WordPress wp-login.php, it allows you can build WP login/register page. See demo: http://demo.sitesao.com/dhvcform/wp-admin
Info: http://codecanyon.net/item/dhvc-form-wordpress-form-for-visual-composer/8326593