Advision is a cloud cross-platform Digital Signage software.
Simple Infopanel is a free digital signage software in PHP and React
Really simple image and video slideshows with the Raspberry Pi
Digital signage for the Raspberry Pi (all models)
Client Server digital signage
For Raspberry Pi 3B and 3B+
Open Source Broadcast Automation Software for LPFM and IPTV
Digital Signage Platform for Linux