EmuNations

BGB is a Gameboy emulator which lets you run Gameboy and Gameboy Color games. It has excellent accuracy, gamepad support, high quality sound and graphics, smooth V-sync animation, and low latency...

SuperModel emulates Sega's Model 3 arcade platform which uses OpenGL and SDL library to those arcade games. It's still considered to be in "alpha" stage of development with game compatibility remaining average, but it's still being actively developed...

SameBoy is a user friendly Game Boy and Game Boy Color emulator that's very accurate and includes a wide range of powerful debugging features. In addition to accuracy and developer capabilities, it has features such as Battery save support, states save states, scaling filters...