Pentabarf-annoncer is a project mainly written in RUBY and JAVASCRIPT, it's free.
An announcer to be displayed on screen in between sessions at a conference managed by Pentabarf
Pentabarf is a web-based conference planning system. This software parses the XML-Schedules of Pentabarf conferences and displays the current and the upcoming events on a webpage that is supposed to be displayed in a fullscreen browser between talks.
So far is is a bit specific to the 26C3 but it is supposed to be usable for all Pentabarf planned events.
All events are imported into a local SQLite3 DB to be independent from the network. If you have ever been at a hacker's conference you know why.
At 26C3 Debian laptops with GDM-autologin and the Arora Browser in fullscreen started via .Xsession. The only problem is that Arora does not save the fullscreen state (yet)