3CX
Description: 3CX is an open-source IP PBX software solution that works with popular SIP phone systems. It offers unified communications features like auto attendants, call routing, voicemail, video conferencing, and more.
Type: software
Pricing: Open Source
FaceTime
Description: FaceTime is a video calling app developed by Apple. It allows users to make video calls between Apple devices like iPhones, iPads and Macs over WiFi or cellular networks.
Type: software