Instantly reach the people in your life—for free. Messenger is just like texting, but you don't have to pay for every message (it works with your data plan).
Google Duo is the new, simple video calling app that brings you face-to-face with all the people that matter most.
UseHangouts to keep in touch. Message contacts, start free video or voice calls, and hop on a conversation with one person or a group
Skype is always ready to provide the full experience even if you don't have access to your phone or desktop app. Simply log in to web.skype.com and get down ... An instant messaging app that provides online text message and video chat services.
Quickly send and receive WhatsApp messages right from your computer.