Better Than Wolves and Portal come to mind first.

BTW is just a labour of love of IMO a genius game designer FlowerChild (RIP) who out of spite for adding wolves to MC made the best game possible, it’s extremely rewarding, all the small details are thought through. And now the community has taken over the torch and are updating it faithfully further.

Portal is just a gem of the game, already mentioned in the thread so not gonna start another one.

OSRS wiki is BY FAR the best wiki in the entire industry.