Whitespace
Most modern programming languages ignore whitespace. This is unfair. Whitspace characters belong to the ASCII table, too! Equal treatment for equal numbers of bits! Behold, Whitespace, the programming language that turns the tables. It actually ignores everything but whitespace characters. It makes it kind of hard to read hard copies of code, but writing comments is easy.

(FYI: I downloaded a whitespace interpreter and some sample programs. Yes, it is a real programming language.)