Xibo - Digital Signage for Everyone!
Linux Show Player - Sound player designed for stage productions
Yodeck - Yodeck enables you to design and schedule your digital signage on Raspberry Pi easily from the web, using your computer, tablet or smartphone.
QLab - QLab, Live show control for Mac OS X.
TelemetryTV - Powerful and Intuitive Cloud-Based Digital Signage Software That Lets You Easily Manage Content on Screens
Cue Player - Cue Player software for theater sound and lighting