What is this E2?

I was recently playing on a server and saw someone using an E2 that, when put on a prop, would make that prop spin around the player. Can anyone tell me what this E2 is called so that I can download it?

http://www.wiremod.com/forum/expression-2-discussion-help/11041-beginners-guide-expression-2-a.html

http://www.wiremod.com/forum/forum.php

To sum it up, E2, or, Expression 2, is a in-game script based on a E2 chip, from Wire. You’ll find alot of e2 scripts on the wiremod forums. You can create holograms, which are essentially models to fit your fancy, and other interesting things.