Championships with interesting formats that provide great shows on the track. Because for normal races there are the official iRacing ones..
Simgrid host for Endurance races with driverswaps
Croco Racing Community (CRC) is a sim-racing organizer that introduces sim-racing competitions to all levels of enthusiasts, Rookie or Pro.
Community focused on hosting quality leagues and one off events on ACC and GT7 on PlayStation.
Sim racing community that focuses on clean and fair racing.