Yodeck - Yodeck enables you to design and schedule your digital signage on Raspberry Pi easily from the web, using your computer, tablet or smartphone.
Xibo - Digital Signage for Everyone!
Visionbox Digital Signage - Visionbox is not just a software, it is a complete Digital Signage system sold in full service.
CloudShow - Digital Signage Made Easy. Turn any screen into a digital sign in minutes with CloudShow.
NoviSign Digital Signage - SaaS based content management system for digital signage.
LibreSignage - An open source digital signage solution