Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Messenger Video Calls - Facebook Messenger, now with HD video calls
Invision - Prototyping and collaboration for design teams
Slack Video Messaging by Standuply - Easily record and send video messages in Slack 📹
Sketch - Professional digital design for Mac.
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.