Coded in a couple days: As part of the interview process, a Smart Grid company gave me 2 months of Smart Meter Data and asked me to write a web application to display their data in a way that would be intuitive for their customers, in any browser. It was a "take home" project, for which they gave me a couple days to complete.
The "Info" button in the App gives access to my code, a Code Critique from the interviewer, and further App Details.
Features highlighted here are now standard (eg, Responsive Design, dynamic DOM modification, graphical analytics dashboard that responds live to mouse input, in-place text & graphical updates without page reload). Obviously, the state-of-the-art is a moving target. Since these were novel ideas at the time, however, I believe this demonstrates the perspicacity I'd bring to tech decisions for your projects.