TGB Dual is the only GBC Emulator which has the Link Cable function and allows two ROMs to run at the same time.
TGB Dual
License(s): Free Version
System(s): Game Boy, Game Boy Color
OS Supported: Windows
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System(s): Game Boy, Game Boy Color
OS Supported: Windows
Visual Boy Advance
Visual Boy Advance M is the ultimate fork of this name. It contains all the previous features of Visual Boy Advance while adds two new ones.
System(s): Game Boy, Game Boy Advance, Game Boy Color
OS Supported: Linux, Mac OS, Windows
Dolphin
Dolphin is the best GameCube/Wii Emulator for the PC platform.
System(s): Gamecube, Wii
OS Supported: Linux, Mac OS, Windows
DeSmuME
Up to now, DeSmuME is the most stable and popular Nintendo DS Emulator on PC platform.
System(s): Nintendo DS
OS Supported: Linux, Mac OS, Windows
GB-Enhanced
Check out GB Enhanced, a potential Gameboy emulator.
System(s): Game Boy, Game Boy Color
OS Supported: Windows