Here's {link:more perfect 10's|http://www.sucks-rocks.com/rate/J2SE/Rebol/BeanShell/Snobol/HyperCard}: Rebol, BeanShell, Snobol, and HyperCard.

Update: while these five languages were all listed as "10.0" on Feb 28th, some of them have since dropped.  Goes to show that this whole thing should be taken with a block of salt.