VariableTriggers
Command Trigger
One I found on a server
No more RedStone Hell
Random Numbers and block animation
Just one of the things it can do
Some other stuff
Piston & Redstone Tourch example - How to make a hidden passage without using any preasure plate or switch.
I made this quick to show someone howto
Do you want to add my video?
http://www.youtube.com/watch?v=e53i98NMyYs