NES roms
All of these roms are very small, none are bigger than 200 kb.
1942
Adventure Island
Alien 3
Balloon Fight
Base Wars
Battle Toads
Battle City
Bionic Commando
Blast Master
Bubble Bobble
Bubble Bobble 2
Bucky O'Hare
Bump'n'Jump
Captain Amerika
CastleVania
Castleyania II
Castleyania III
Chip'n'Dale
Contra
Contra Force
Crystalis
Darkwing Duck
DigDug I25I
Digger
Double Dragon II
Dragon Warrior 2
DuckTales
DuckTales 2
ExciteBike
FF1
G.I.JOE
Gauntlet
Gauntlet 2
Ghosts'n'Goblins
Guerilla
GunSmoke
Ice Climber
Jackal
Jetman
Jurassic park
M-Tetris
MegaMan I (RockMan)
MegaMan II
MegaMan III
Ninja Gaiden II
Ninja Gaiden III
PongWars
Rush'n Attack
Snake: Battle'n'Roll
Super Billy Bros
Super Contra
Super Donkey Kong 2
Super Mario Bros 1
Super Mario Bros 2
Super Mario Bros 3
The Battle Of Olympus
TinyToon adventures
TopGun
Vice
Wizards and Warriors