I built among others http://recovermywebsite.com, which can retrieve your page from the Yahoo or Bing cache. It took more like 100-300 hours instead of 10 :)
That's cool, my mate cancelled his hosting recently and forgot to download his files. The website needs replacing anyway but if this works at least he'll be able to get the old one online again.
Not as sexy as some of the things you can find on this page, but :
https://github.com/madjar/pyramid_persona/ : a lib to use the persona auth system from mozilla with the pyramid web framework (that is specific !)
- http://gclimbing.com/ - A blogging site for climbers (though this took a lot longer than 10 hours).
- http://scribblingspree.com/ - A simple drawing game. The main reason I wrote this was to practice Wicket and Canvas. The initial version took less than 10 hours.
http://sunsetter.herokuapp.com/ - a small web app that tells you when the sun will rise or set in a particular direction (when you want to take a picture of the sunset behind Mount Fuji or when something like Manhattanhenge happens in your city)
I built http://ipsum.me, an ipsum generator for web developers, with placeholder functionality for those dozen <li> tags in your mockup that you'd like to fill with a list of names.
http://allthefavicons.com - Create favicons and idevice icons in 1 easy step.
http://instantise.com - created this for other instant engines when google instant launched, not touched it in years.
- http://patternify.com – A pixel pattern generator that produces CSS Base64 code (made with jQuery)
- http://thetoolbox.cc – A directory of useful web apps and tools (made with WordPress)