Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Cobrowse.io - Screenshare and remote control built into Android & iOS apps
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Samesurf - Samesurf is a patented, real time collaboration platform that enables multiple people to interact with the same online experiences in real time from any device or browser without installs or coding.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
Copointer.com - Copointer is technology for co-browsing on your website, that will help to improve your customer support and to be on the same page with your client.