Roblimo from the also-good-in-case-of-vampire-attacks dept.
Project Byzantium calls itself Ad-hoc wireless mesh networking for the zombie apocalypse. It's also potentially useful for less-thrilling emergencies, such as floods, earthquakes, and political uprisings (or getting everyone at the office their /. fix when the network goes down). The latest version debuted at the HOPE (Hackers on Planet Earth) conference in July, 2012. You can download your very own copy of Byzantium any time you like. Hopefully you will then burn a dozen or so CDs (it's compact enough that it doesn't need a DVD) for friends and neighbors, so that if you suddenly see zombies approaching and your regular ISP has already been overrun and isn't working, you can set up a wireless mesh network and coordinate your anti-zombie efforts. And you won't even need to use the command line. (slides and audio of their presentation)
Utility is when you have one telephone, luxury is when you have two,
opulence is when you have three -- and paradise is when you have none.
-- Doug Larson