>>1828611
sm64coopdx has won the poll.
https://sm64coopdx.com/
Download: https://github.com/coop-deluxe/sm64coopdx/releases/tag/v1.3.2

You'll need a Mario 64 (USA) ROM in .z64 format, just drag and drop the ROM into the game window when it asks for it.
Lobby password: rage