I occasionally write small web apps. On the off-chance that somebody might find them useful, I put some of them on my Web Apps page and make them available under a free and open source software licence.
The apps include a run recorder, video chat, a day of the week finder, a Morse Code translator, an APR calculator and a number of vote counters.
If I go out cycling or walking, I'll often record the route as a GPX file. If it's an interesting route, I'll post it on the routes page, where you can download the GPX, or view it on a map, along with any photos I might have taken en route.