Openfo  

- Openfo is a USA-based startup in the audio/video solutions industry that offers an open-source VoIP server designed for Raspberry Pi.
- With Openfo, users can connect with any device, anywhere in the world, via high-speed wireless, allowing for convenient sharing of screens, voice, and video.
- The website design of Openfo provide users with a clear understanding of the VoIP server's features and capabilities.