i have found by now :

For modded Minecraft https://forum.feed-the-beast.com/

For the Hitman games https://www.hitmanforum.com/

For knitting and crochetting https://www.ravelry.com/

For cannabis-related https://future4200.com

For cactus growing https://cactiguide.com/cactitalk/

Competitive mario kart https://mariokartboards.com/

Rpg.net is a nice place to discuss ttrpgs

An ancient 2chan clone for discussing trains https://www.1chan.net/

shroomery.org for mushroom cultivation and general discussion

forum.paradoxplaza.com/forum for Paradox games

https://cs.rin.ru/forum/ good source for updated pirated games and DLC (some chuds on here, but it’s mostly centered on games)

https://forums.mydigitallife.net/ for pirated software (usually mainstream and niche Windows versions, MS Office, some Adobe). It could be very technical at times, so you’ll have to do some research before downloading and installing anything.

Nedesigns.com is a Rollercoaster Tycoon fan site

https://www.geeksforgeeks.org/ for coding

(i will update this with the comments)