Dolwin
Dolwin was the first GameCube emulator to be released publicly. It is open source and written in C. Development stalled in 2005 and there have been no new releases since, partly because of the success of Dolphin, the GameCube and Wii emulator.
Before development stopped, Dolwin could boot and run some commercial games and a few demos. For the most part, though, it is incomplete, and you should not expect it to run games correctly or even boot them.
For playing GameCube games, use Dolphin.

