If you're new to ColdFusion, never heard of it, or want to know more about it, here is a nice introductory article that gives a good overview of the software.:
http://www.htmlgoodies.com/primers/databas...cle.php/3756161

If you're a web developer, you should at least know/read this.

Is ColdFusion tut on W3?

No, it's not. It wouldn't hurt you to look around a bit before asking questions.
This topic is pinned as an important topic, meaning it's a typical read-first when going into a new forum:
http://w3schools.invisionzone.com/index.php?showtopic=6706

It says at the bottom, and I quote:
NOTE: Due to server side technologies currently not available to w3schools hosting services, Cold Fusion Tutorials are not offered on w3schools.com until further notice. Any post requesting CF tutorials will receive no reply and be immediately removed.