Wasabi?

http://www.joelonsoftware.com/items/2006/09/01b.html

I just contributed http://www-sop.inria.fr/indes/scheme2js/.

I thought about including the fact that Pugs had a JavaScript backend then decided not to because Pugs never was completed (and likely never will be).

List of interpreters implemented in JavaScript for various languages would be also nice. I think they can be useful for educational purposes i.e. writing interactive materials on the web.