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.
Oh. Good one. Markdown everywhere. Slack always pissed me off for it’s sub par markdown support.
There is an option in the settings to use markdown formatting. I haven’t tried it but I guess it at least makes formatting less annoying.
It’s a (small, shitty) subset of markdown. Slack formatting just kind of sucks.