Perl code can be difficult to read. But it doesn't have to be. If you write the code safely and deliberately, Perl can be read very smoothly.

Not Befunge. I love this language. Where else can you modify the program (not only the flow, but the source code!) as you go along? Where else are instructions single characters? Where else does the instruction pointer move in any direction you choose? Where else can you write quines that look like ,1+:b`#@_:0g ? (Or g,1+:b`#@_:0, or 0g,1+:b`#@_:, or :0g,1+:b`#@_ ?)

I think many people here would love this language. Befunge is a stack-based language, which reads instructions one character at a time, and in any given direction -- in fact, you can read in two integers from the user, and use that as your IP delta: &&X . How wicked is that?

And what about the "Hello, world!" program? Gotta have that. 0"!dlrow ,olleH">:#,_@ .

Sorry if this seems too esoteric, and totally out-of-place in a Perl community, but I think this language is something that many Perlers here would definitely enjoy. Hey, I wrote a credit card validator in it!

japhy -- Perl and Regex Hacker