He named it Script# (pronounced: ScriptSharp).
Let me repeat (I’m hooked, sorry ;-)):
(1) No more need for alert(“…”) or debugger;
(2) You can compile the code and get typos errors before running the explorer and be spammed with yellow message boxes.
(3) IntelliSense people. IntelliSense. no need to open MSDN to find window or document members.
You can find a set of demos, examples and of course -the binaries at Nikhil’s Blog.