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Ask HN: Most interesting tech you built for just yourself?

1901 points l2silver | 1 comments | 27 Apr 23 15:04 UTC | HN request time: 0.208s | source

Maybe you've created your own AR program for wearables that shows the definition of a word when you highlight it IRL, or you've built a personal calendar app for your family to display on a monitor in the kitchen. Whatever it is, I'd love to hear it.
1. susam ◴[28 Apr 23 07:08 UTC] No.35738390[source]▶
https://mathb.in/

I wrote this 11 years ago for my friends and myself who were going through a phase in our lives when we used to challenge each other with mathematical puzzles.

The use of this tool spread from my friends to their friends and colleagues, then schools and universities, and then to IRC channels. Now it is the oldest mathematics pastebin that is still online and serving its community of users. Visit https://github.com/susam/mathb for the source code of this tool.