I’ll start: https://tilde.green - free shells with static webpages, privateBin (pastebin), Git
https://segfault.net - free temporary VPS servers, all go trough VPN’s, TOR proxy, tons of coolest stuff i’ve seen
https://fmhy.net - FREE MEDIA HECK YEAH - how to screw copyrights while staying safe, tons of resources
https://free-for.dev - resources on free stuff to aid with development
Awesome on github is a very good resource for anything. They are not necessarily linked to each other, anyone can create her own awesome list
https://github.com/Igglybuff/awesome-piracy https://github.com/awesome-selfhosted/awesome-selfhosted https://github.com/pluja/awesome-privacy https://github.com/valpackett/awesome-gtk#audio-streaming-service-clients https://github.com/awesome-jellyfin/awesome-jellyfin https://github.com/ThePBone/awesome-shizuku https://github.com/qjcg/awesome-typst