Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
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.
Lingo - Empower Creation and Ensure Brand Consistency. Build and Share libraries of visual assets with your entire team — all from your desktop.
Ring4 Meeting - Dead simple video conferencing - free, in browser
tSIP - tomeko.net/software: SIP client for Windows.
Suttna - Keep every team member in the loop