Chaos Communication Camp 2015 Fahrplan for iOS 
Fahrplan App for your iPhone and iPad is now also available on your Apple Watch for Camp 2015. If you haven't downloaded the app already in the past, grab it here .
Web / HTML / XMPP
XMPP Notify - XMPP/Email notifier for the Fahrplan
Another re-data-based schedule with both talks and workshops: http://astro.github.io/campfahrplan/
Google Calendar will happily accept the ical feed ( https://events.ccc.de/camp/2015/Fahrplan/schedule.ics ), however it will lack displaying certain details, such as speaker, and a link back to the Fahrplan site for extra info (such as speaker).