Daily.co for Intercom - Free video calls & screen shares embedded in Intercom
Thursday - Thursday is where remote teams do their socials.
Pluot Communications - Big-screen video conferencing for startups
Kosy Office - Kosy is a virtual space for remote teams to work and hang out.
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.
Watercoolr - Your always on drop-in virtual coworking space