MicroSIP Lite www.microsip.org
winget install --id=MicroSIP.MicroSIP.Lite -e It allowing to do high quality VoIP calls (person-to-person or on regular telephones) via open SIP protocol. From cloud of SIP providers you can choose best for you, register account and use it with MicroSIP. You'll get free person-to-person calls and cheap international calls.