Strangest languages you know

I know quite some GolfScript, a stack-based programming language that solves problems in as few strokes as possible, and ZZT-OOP (remember ZZT games?) is probably also up there. I also like to pretend I know APL but in fact I'm terrible at it.

What are the most obscure, strange, or useless programming languages you know, /prog/? Bonus points if they're not actually esoteric (Brainfuck, Befunge, etc.)

>>13
You are a fool.

A fool are you.

Your faggotry is infectious and ultimately destructive.

Ultimately destructive and infectious, your faggotry is.

Is your faggotry infectious and ultimately destructive?

Yes.

HAND