Fuse - Fuse is a UX tool suite for mobile app designers and developers.
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.
Dropsource - Mobile development platform for building native iOS & Android apps
Quickie - 3-60 second video calls with your friends
GoodBarber - GoodBarber is a mobile app creation platform.
Messenger Video Calls - Facebook Messenger, now with HD video calls