LMS is an open source multi-room audio system. It was created by SlimDevices and then acquired by Logitech. Although Logitech has ended development of hardware devices, the project is still very active with lots of plugin released regularly. New hardware players can be added using PI devices and DAC boards to build high-quality multi-room systems.
I’ve created some extra plugins, especially to include new standard hardware / players to the LMS ecosystem: UPnP/DLNA (Sonos), ChromeCast and AirPlay.