What are some useful websites that most people don't know about?

https://0x0.st

https://ipinfo.io

https://tsimobile.viarail.ca/ (if you live in canada and take the train)

paperswithcode.com skimfeed.com freecomputerbooks.com/ All Legal, not a bookz or warez site OPen access peer reviewed journals https://doaj.org/search/journals?source=%7B%22query%22%3A%7B...