A weather site in six (declarative) lines
For several years I maintained a hodge-podge of little web-based utilities at toolbot.com. Recently I decided to wipe the slate clean, bringing things back selectively. One of the few that I missed personally was my weather site. It returned National Weather Service forecasts in response to compact URLs of the form weather.toolbot.com/05667, for any five-digit US zipcode.
Originally, the site worked by scraping plaintext forecast files on the NWS servers. Eventually those went away; I looked at and gave up on the arcane (to me) SOAP interface that superseded them. All I wanted was a damn weather forecast, without ads, via an easy-to-type-no-matter-where-I-am URL.