Daily.co for Intercom - Free video calls & screen shares embedded in Intercom
WebinarNinja - Beautiful webinars. No worries.
Pluot Communications - Big-screen video conferencing for startups
eWebinar - Turn any video into an interactive, automated webinar
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.
Slingshow - Transform your boring webinars into interactive events