Game Cube

The first Nintendo console to use optical discs and supports connectivity to their hand held GBA.

Dolphin

One of the best emulators we have ever seen period. The first GameCube emulator to run commercial games. Supports built in netplay and does an excellent job at it. Great performance and speed. The only downside and reason why it does not recieve a 10/10 is you need a great PC to play games on it. It also runs Wii games by the way.

SuperGCube

Anything compared to Dolphin is going to look sub-par but this Win32 based GameCube emulator isn't all that bad and deserves a mention.

GCEmu

More of a we told you so emulator, this Game Cube emulator uses recompilation techniques and other tricks to achive a reasonable speed. A very incomplete emulator that makes the list because of its ingenuity.