Daily.co for Intercom - Free video calls & screen shares embedded in Intercom
Culture Codes - Company culture decks aggregated all in one place
Pluot Communications - Big-screen video conferencing for startups
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
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.
Culture Your Culture - Finally, the much needed step-by-step "how to" for culture