Odd corners of the site: small things built because they were interesting to build. Everything here is free to use and share.
Big Sky: GA Circuit Traffic Simulator
The “big sky theory” says mid-air collisions are rare simply because the sky is big and aeroplanes are small. This puts that to the test: a top-down radar view of light aircraft flying the circuit at a single-runway airfield, realistically but imperfectly, with no lookout and no airborne collision avoidance, to see how long it takes for two of them to meet.
Spawn traffic, run time at up to 64× speed, and watch the conflict analytics; a vertical profile display shows what the radar view can’t. Runs are seeded, so any near-miss or collision can be replayed exactly. Everything runs in your browser.
Five-Minute Psychology
Six classic instruments from the research literature (not internet quizzes) rebuilt for the browser. Risk appetite (the balloon task), cognitive reflection, delay discounting, vigilance, Big Five personality, and moral foundations.
Each takes about five minutes, scores you the way the papers do, explains what the number means (and what it doesn’t), and produces a shareable results card. Everything runs locally in your browser; nothing is uploaded.
Interval Timer
A distraction-free count-up timer for time-boxed sessions. Set a target duration and a repeating chime interval; it counts elapsed time and intervals, shows what’s remaining, and gives a soft bleep at each interval and a longer tone when time is up.
Handy for talks, workouts, standup meetings and interview exercises. Your settings are remembered between visits, and there’s a mute button for quiet rooms.