Yay for esoteric programming languages!
You know the old "Hello World" program right?
Well, here it is in 5 less-commonly used programming languages:

In INTERCAL:

DO ,1 <- #13 PLEASE DO ,1 SUB #1 <- #234 DO ,1 SUB #2 <- #112 DO ,1 SUB #3 <- #112 DO ,1 SUB #4 <- #0 DO ,1 SUB #5 <- #64 DO ,1 SUB #6 <- #194 DO ,1 SUB #7 <- #48 PLEASE DO ,1 SUB #8 <- #22 DO ,1 SUB #9 <- #248 DO ,1 SUB #10 <- #168 DO ,1 SUB #11 <- #24 DO ,1 SUB #12 <- #16 DO ,1 SUB #13 <- #214 PLEASE READ OUT ,1 PLEASE GIVE UP

In BF, AKA Brainf***

++++++++++ [ >+++++++>++++++++++>+++>+<<<<- ] >++. >+. +++++++. . +++. >++. <<+++++++++++++++. >. +++. ------. --------. >+. >.

In L337:
here.

In Whitespace:
here.

And in the best one of all, the Shakespeare Programming Language:
here.

Roxors
And yes, all of these are actual programs. If you run them through the appropriate compiler, you will get a program that prints "Hello World" to the screen.

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