Daily.co for Intercom - Free video calls & screen shares embedded in Intercom
eWebinar - Turn any video into an interactive, automated webinar
Pluot Communications - Big-screen video conferencing for startups
Poll Everywhere - Audience response system that uses mobile phones, twitter, and the web. Responses are displayed in real-time on gorgeous charts in PowerPoint, Keynote, or web browser.
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.
TwentyThree Webinars - A webinar tool you can finally love