Algodoo

It contains some logic gates...

PLEASE MAKE THE STUFF WITH IT!!!

IF - It works like faster Delay gate or it doubles the laser.
NOT - It negates input - If is input off the laser is on, if the input is on, the laser is off
LED - This is not a gate (I think you know it) It just works like indicator.
ONE - If you light onto it, it will send only one short signal.
Delay IF - You must to wait a while and then it will make output on
Delay NOT - Wait a while to make output off
AND - Two input gate - If both inputs are on, it will switch output on
NAND - Two input gate - If both inputs are on, it will switch output off
OR - Two input gate - If any input is on, the output is on
NOR - Two input gate - If any input is on, the output is off
XOR - Two input gate - If you want to make output on, you mustn't have same signal on the inputs
XNOR - Two input gate - If you want to make output off you mustn't have same signal on the inputs

Enjoy!