HousingMaps was the very first Google Maps mashup, created before there was a
Google Maps API. It overlaid Craigslist apartment and housing listings on a map,
for some 30 US cities plus London.
When it launched, in popularized the idea that real estate was best browsed on a
map -- before that, real estate sites only showed lists of properties! It also
introduced the idea that you can build a new website or service by borrowing
pieces from existing sites, without asking for permission. The web is open,
and we can shape it to our needs.
Now that Craigslist has a map
view for all its housing listings, HousingMaps is currently taking a break.