There are a couple I have in mind. Like many techies, I am a huge fan of RSS for content distribution and XMPP for federated communication.
The really niche one I like is S-expressions as a data format and configuration in place of json, yaml, toml, etc.
I am a big fan of Plaintext formats, although I wish markdown had a few more features like tables.
Oddly having several variants rather than a standard despite “regular” being in the name: everyone I work with eschews regex but after finally taking the time to learn more than just the basics of it a few years afk I find it so incredibly useful almost daily.
What resource did you use to master it? As every time I have to use regex I want to cry.
Very much the same. I was terrified of regex, now I love it