Ring4 Meeting - Dead simple video conferencing - free, in browser
YouMail - YouMail turns visual voicemail into a personal assistant for handling all your missed calls.
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.
Hi Voicemail - Stop robocallers filling up your voicemail
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.
MightyCall - Virtual phone system that lets you run your business from anywhere.