Emulator:
Snes9x for Win95/98. Requires Directx5.0 or 6.0.
Games:
Super Mario Bros.
Super Mario Allstars
Donkey Kong Country 2
I promise you I'll put more on as soon as I get them!

Emulator:
SMYGB for Windows.
Games:
Super Mario Land
Super Mario Land 2
Super Mario Land 3: Wario Land
Warioland 2 (Color)
Gex: Enter the Gecko(Color)
Zelda DX(Color)
Turok 2(Color)
Tetris DX(Color)
Game Watch 2(Color)
I'll get more games for you here too!

Emulator:
KGen for DOS.
Games:
Vectorman 2
Earthworm Jim 2
Quackshot
Rocket Knight Adventures
Wolverene: Adamantiam Rage
And, just to make you happy, more games coming here, too. Joy!!!!