The Foldaway Emergency House and Other "Afrigadgets"
Rajan Harinarain, a South African entrepreneur and inventor has come up with a temporary foldaway house for use in emergency situations complete with electrical wiring and fittings, doors and windows that can be erected by a small team in 5 minutes.
Afrigadget is a great site (though with irregular posts) about a bunch of interesting developing-world-inspired inventions and tinkerers. Their most recent post covers a new type of emergency shelter. (Via Ndesanjo on Global Voices.)