RPi Projects/Digital Signage

Digital Signage platforms

 * 1PLAY - Cloud Digital Signage designed for Raspberry Pi (Pi 1,2,3,4, PiZeroW, PiZero2W, Pi3 A+). Easy installation, simple tv screen management. Supports : Images, Videos, RTSP streams, Webpages, HTML Apps, Custom Apps, Play in sync, Landscape and Portrait orientation, Videowalls of any size, Proof of play, Easy screen deactivation and much more.
 * Yodeck - Digital Signage cloud platform, powering tens of thousands of Raspberry Pi's. Supports images, HD videos/streams, YouTube, HTML5 (+ scripting for login forms), PDF/PPT/XLS/DOC, widgets, RSS tickers, rotated monitors and video-walls, unlimited storage/bandwidth. Unlimited users, with fine-grained security control and SAML. Free for 1 monitor, free RPi 4 Model B for all monitors with the annual plan.
 * Linutop OS Linutop OS is now available for Raspberry. Powerful, yet lightweight, Linutop Kiosk software allows to easily setup a digital signage solution. This new version includes a network remote control for smartphones, tablets or PC to interact live with your digital signage player.
 * Raspberry Digital Signage - A digital signage solution for displaying web resources in a secure fullscreen view.
 * Raspberry Slideshow - Raspberry Slideshow is focused on quick-to-set-up image and video slideshows for the Raspberry Pi.
 * Screenly - The most popular digital solution designed for the Raspberry Pi. Powers over 10,000 screens around the world. Available both as an Open Source and as a commercial version.
 * piSignage - Digital signage for all
 * pisignage-server Open source
 * PiSignage on Chrome - Chrome app
 * http://www.concerto-signage.org/ - open source
 * [RasPi discussion https://groups.google.com/forum/?fromgroups#!topic/concerto-digital-signage/VbEZDhGWKZc]
 * FirstView PiCube - A digital solution designed for the Raspberry Pi capable of displaying Images, HD Videos, RSS feeds and text presentations
 * RiseVision Digital Signage Platform - The Enterprise Digital Signage Platform. Everything you need to create amazing digital signage for FREE
 * info-beamer - Both standalone player software and hosted service available. Fully programmable in Lua, so you're not limited to prepared templates.
 * Kurkshop Electronics - Player for monitor systems. Can play standalone or in master-client configuration. Pictures, movies, text. Including a webinterface so anyone can understand.
 * World VDS Digital Signage Platform - Complete multiplatform solution for Digital Signage, available for Raspberry Pi, Windows, Linux, Android Players, and SoC TVs: Web OS (LG), Tizen (Samsung) and Philips (Android).
 * World VDS Digital Signage in Raspberry Pi

Raspberry Pi projects

 * http://openelec.tv/component/k2/item/235-openelec-on-raspberry-pi-our-first-arm-device-supported
 * http://www.raspberrypi.org/phpBB3/viewtopic.php?f=9&t=924
 * http://jstx.sourceforge.net (control TV with RPI)

Talk about Raspberry Pi as a digital signage driver

 * http://www.raspberrypioneer.com/2012/06/07/raspberry-pi-project-2-raspberry-pi-driven-digital-signage-and-environmental-monitoring/

Screen blanking

 * http://www.raspberrypi.org/phpBB3/viewtopic.php?t=11115&p=122635
 * http://next.kolumbus.no/2012/06/22/raspberry-pi/

Rotate Screen

 * General Linux reference - http://crunchbanglinux.org/wiki/howto/rotate_the_pc_screen
 * Nvidia specific - http://ubuntunation.blogspot.com/2009/11/howto-rotate-screen-in-linux-using.html
 * RasPi specific - http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=9450&p=109398&hilit=rotate+display#p109398
 * http://elinux.org/RPi_Kernel_Compilation#Debian
 * Yodeck Supports rotated monitors by rotating X and rotated GPU-based video playback.

In general it seems this issue has not been resolved. Maybe http://www.bootc.net/projects/raspberry-pi-kernel/ will help?