If you're in any flavor of academics from middle school to doctorate program or otherwise writing papers that require strict citation formatting, drop what you're doing and click that link.
Or probably YouTube it or something first so you can see why it's so much better than your standard internet citation generators.
Don't forget to share the intel with your classmates!
Edit - honorable mention to Desmos for 99% of your calculator needs... with the unfortunate exception of exams, cuz phone.
it's the sort of tool that is really just fundamental now and should be ubiquitous and promoted and taught and talked about every where there is knowledge work. Even more so as there's a great open source version of the tool.
This, logseq, and PKM in general for me. I guess it's not really "can't live without" because I hardly know where to start, but the possibilities for organizing my mess of a brain are enticing.
It would probably help to have a project to work on and actually use the things rather than diving too deep into PKM conceptually... Really wish I knew about them in school, though.