Algodoo

for some reason,the NOT gate are weak,you can't operate
it too fast,if not, it explodes.
green one is AND gate
yellow one is OR gate
red one is NOT gate
you can make the NAND NOR and XOR(already included in scene)gate
yourself.i never tested its ability in big circuit before,because it's hard to
make circuits bigger than a XOR(mainly because the NOT gate)