These are some tools I've made over the years. You may find them useful, you may not. It's really not for me to decide.
⏱ Running Pace Converter, which converts pace between min/mile and km/mile.
👟 Marathon Pace Calculator, which calculates the running paces necessary to achieve a target marathon time while using the 10/10/10 rule.
🏃 Jog-Log, a tool that allows you to record the poetic impressions of running, turning motion into poetry.
🍤 Prawn Tempo-ra, a tempo tapper and delay time calculator.
🐓 Chicken Key-ev, a key transposer and chord finder.
📚 Dewey Decimal Explorer, an interactive reference to explore of the Dewey Decimal Classification system.
🕹️ Tumbleword is a browser-based game I made that combines elements of Tetris and Wordle. You place falling letters to find a 5-letter word pre-selected by the computer. The speed increases as you successfully find words and clear previous letters. There is a leaderboard impemented that logs the 10 highest scores across all users.
[The front-end is made with vanilla JS, and the leaderboard is an API served by Node.js and express.js.]