GoodBarber - GoodBarber is a mobile app creation platform.
Ring4 Meeting - Dead simple video conferencing - free, in browser
Dropsource - Mobile development platform for building native iOS & Android apps
Stork.ai - AI-Based Collaboration for Hybrid Teams. Rich media messaging, advanced video and voice conferencing, auto-transcribing and screen sharing. Serendipitous meetings at the water-cooler with your human and AI teammates.
Bizness Apps - Create your own app or become a reseller and build apps for others
openmeet - Account free video conferencing with a rooms component that lets you use VC within a physical meeting room. The server can also be hosted in your own cloud for extra privacy/security.