(via http://ask.metafilter.com/273550/I-spy-with-my-little-eye-everything-that-is-happening-everywhere )

• Breaking News - important global news. https://www.breakingnews.com/
• USGS Earthquake Map - quakes. http://earthquake.usgs.gov/earthquakes/map/
• FlightAware - planes. http://www.flightaware.com/
• FlightRadar24 - planes. http://www.flightradar24.com/
• Global Incident Map - various news reports. http://www.globalincidentmap.com/
• Helioviewer - the sun. http://www.helioviewer.org/
• Tweetping - Twitter. http://tweetping.net/
• Norse Hack Attack Map - hacking. http://map.ipviking.com/
• Wind Map - weather. http://hint.fm/wind/
• Marine Traffic. https://www.marinetraffic.com/
• Lightning. http://www.blitzortung.org/Webpages/index.php?lang=en
• VHF Propagation. http://aprs.mountainlake.k12.mn.us/
• real-time weather conditions. http://earth.nullschool.net/
• Live Air Traffic Control. http://www.liveatc.net/
• electricity generation in the UK by type. http://www.gridwatch.templar.co.uk/
• Dutch trains. http://kubus.mailspool.nl/spoorkaart/

various ~real time data sources