https://typst.app/play
A typesetting engine, think of it like LaTeX but way better. The basic syntax is pretty much Markdown, see typst for more info.
https://pen.new
You probably know CodePen, it's an HTML / CSS / JS editor and a code sharing tool.
https://cobalt.tools
Video / audio downloader
https://paste.rs
HTTP pastebin
http://wttr.in/denver
Weather service with a bunch of functions, for instance:
$ curl wttr.in/krasnodar
old report
$ curl v2.wttr.in/krasnodar
temp graphs, very beautiful
$ curl "wttr.in/krasnodar?format=1"
⛅️ +2°C
$ curl "wttr.in/krasnodar?format=2"
⛅️ 🌡️+2°C 🌬️↑19km/h
$ curl "wttr.in/krasnodar?0"
Weather report: krasnodar
\ / Partly cloudy
_ /"".-. +2(-1) °C
\_( ). ↑ 19 km/h
/(___(__) 16 km
0.0 mm
Here's the readme if you want to learn more!
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