Tragofone - White-label VoIP Softphone with WebRTC and Auto-provisioning
ClickShare - Share ideas and content securely from any device on the meeting room screen
tSIP - tomeko.net/software: SIP client for Windows.
Airtame 2 - A bold new wireless screen sharing solution
PhonerLite - PhonerLite enables your PC to use it for internet telephony (VoIP , Voice over IP, SIP).
SignalWire - A next-generation communications API and collaboration platform. Powered by a global elastic cloud network featuring APIs for video, voice, messaging, and collaboration products like SignalWire Work, SignalWire Events, and more.