The other day I needed a stopwatch to time a talk I was giving, but I had a problem. My stopwatch was ALL the way outside in the garage! Now I obviously wasn't going to get up and get it, so I figured there's gotta be something online. Sure enough, there are quite a few online stopwatches.
After using one, I started to think "Man, I should try to make this, it'll be a good exercise". So I did.
Hopefully you'll find this useful. And if not, at least it looks cool!