What websites / plattform + tools do you love most using

Reddit for example is super useful for asking people about anything, getting great book recommendations and just instant feedback that is also quickly rated. This post is about "tools" and possibilities that are at our fingertips thanks to the internet.

More Examples

• Udacity for quick courses on tech fields and “Zero to Mastery” (broader), love it, but are there better ways for learning xyz? What did you like?
• www.Archive.ph to perma archive Websites
• If Reddit is for people, for what is GitHub exactly? What to do with opensource projects, can you find people? Can somebody explain the magic of github?

• Also discord! Connect with likeminded people, build things, discuss. But how to find quality ones ect. A discord guide from somebody who wants to share

• What Subreddits / general platforms / sources are best for learning economics, markets, or finance that have value in personal life?

• What is your opinion on Wikipedia, or are there better alternatives?

• What have you learned from Reddit or other platforms that was super useful?

• Better AI than ChatGPT? I know Manus.im, super impressive but expensive.

• Also, r/pir*cy (don’t judge) has helped me a lot—any similar places for you?

• Anybody here with darkweb experiences? (just what useful things you could do with that, easily, without much risk)

• Is there a website to find websites with inputs as what I want to do?

I found YouTube isn't that useful compared to the new stuff that I discovered, I love these much more in terms of raw value. So YouTube is more about quick visual fixes if I need something.
Also what is your opinion about brilliant, betterhelp? I don't like them, although the Idea that they sell is exactly what I would want.

So just drop what you personally love to use and want to shout out. You of course don't have to answer everything. Maybe I should make separate posts some day.