Here are some that are noteworthy and funny:

  • Is it Christmas – http://isitchristmas.com – Funny as it tracks the timezones across the globe, really only has much to do on one day per year though. But that one day is coming up soon, so start checking in daily.
  • Is it Dark Outside – http://isitdarkoutside.com – Whopping funny. Works every day of the year.
  • Umbrella Today – http://umbrellatoday.com – I guess they are hawking an iPhone app, but I really enjoyed how the interface pulls you in a little bit at a time. And if you visit for the first time on a rainy day (or just put in a Seattle, Washington zip code), that rainy-day graphic is stunning.

It’s all about hiding the complexity. Do something hard with your software but don’t make the users suffer just you did.