Wiki syntax conversion utility

A few months ago, I came across a Wiki syntax conversion utility on the web. It allowed me to paste some wiki text into a form, specify what kind of Wiki it came from (jspwiki, xwiki, mediawiki, etc.), specify what Wiki form I wanted it converted to, and then would convert it for me. I spent some time Googling today to find it, and I can't. I even searched this list's archives, because I thought I might have read about it here. If anyone knows what I'm talking about and could respond on this list, I would really appreciate it! Stephen