Dylan. But you said popular, so Javascript then. Seriously, JS is not what I'd consider a very good Lisp, but I think it is one because it allows you to build

Dylan. But you said popular, so Javascript then. Seriously, JS is not what I'd consider a very good Lisp, but I think it is one because it allows you to build real lexical closures. Edit: Haskell is a sort of a lisp too, and it's the only one IMHO that got rid of the parens in an intelligent way. Haskell lets you use either prefix or infix notation, and it works mostly without parentheses. Plus you can use the '$' character as a clever hack to remove parens where they would otherwise be needed. But...the price you pay for this is laziness and automatic currying, which most Lisps don't do.