This is just a fun little app I put together to exercise my brain.
When someone visits the site they're greeted with “Will it freeze in _ tonight?” They fill the textfield in with the city, state (autocomplete is enabled for most places in the US using jquery autocomplete and ws.geonames.org) or zipcode. Using @jnunemakers gem google-weather the app pulls the forecasts info in and displays a message according to the answer. It's really simple and there are a lot more things I want to add to it.
It currently needs refactoring and I'm working on that daily as I learn more and more about Ruby. You're very welcome to read it and learn how not to write Ruby code.