The functionality to turn of the editor for one module doesn't exsit.
But, you can paste both HTML and things like javascript into the header or footer of the module and the editor will not touch it. I tend to prefer the footer.
You can check the page source to see how things are placed.
You might also want to check out the Widget Suite (
http://dnnwidgets.com/). There are some tools there that you might fine helpful.