Lilac Soul's GeneratorThis was linked by 420 above, but I just had to add a bit to it. I have been playing with this for a few days and I gotta say it's awesome. The designer of this program put a lot of work in, and the program itself is very simple to use. The interface just asks you a few questions on what you'd like to do, and the program compiles the code and pastes it to the clipboard for you.
Few things I've used it for so far:
Complex conditional statements (Sucks getting lost in the stream of if.. then's).
Customizing NPC actions/animations (I hate doing this).
Debugging code.
Now it doesn't work strictly as a code debugger.. but if you've got a function that just *isn't* working right, then just create it using this, compare the code and see where you screwed up.
I'd say for the novice and experienced coder alike this is a very useful tool.