Use a third-party CSS or JS Framework, a self-hosted service like a CRM, or a third-party service with the site.
At the time of user register, entered mobile number on user register form have to verify using OTP facility before registration.
Import Zendesk ticket forms to Drupal and submit to Zendesk. This requires a Zendesk Enterprise account.
Integration with Drupal 7 Webform 4.x and Lasso CRM Register API.
This module let you to login with your google account and/or create a user with your google account.
Finally your visitors will be able to chat with you in private. For each visitor a Slack channel is created.
Helper module for Swift Mailer.
Takes care of inline WYSIWYG images that are inserted in body text using relative paths (default behaviour for most WYSIWYG editors).