Comment JScript (Score 1) 386
No IDE here, but if all what you want is discover new territories, you'll just need an editor. Apart from PowerShell, there is another decent scripting language on Windows, which is JScript. That's a Javascript implementation allowing to access system resources through "ActiveXObjects". Example:
var fso = new ActiveXObject ("Scripting.FileSystemObject");
Have a look at MSDN for reference about this object and others, then browse it, and various blogs, while happily writing your scripts in whatever editor is present on your machine. By the way, they will run on any Windows system, even XP. The drawback is that interfacing to DLLs is often impossible when it hasn't been provided by MS.
Then, you might want to explore Javascript as a functional language - a usable Lisp in my opinion...