EmptyFuck

EmptyFuck is an invisible brainfuck equivalent created by User:DrParanoya.
It was not influenced by Whitespace, User:DrParanoya came up with the idea of an invisible programming language on his own.

Commands

brainfuck	EmptyFuck
+
-
>
<
.
,
[
]

That's right - no commands (just kidding).
EmptyFuck only uses 2 characters: spaces and newlines.
Every brainfuck command is associated with a set number of spaces:

brainfuck	Amount of spaces
+	1
-	2
>	3
<	4
.	5
,	6
[	7
]	8

Every line is made up of 3 parts:

• An exact copy of the previous line (obviously execluding the newline)
• Any number of 1-8 spaces
• A newline

The order doesn't matter as long as the newline comes last.

Implementations

User:DrParanoya is the developer of efdk (EmptyFuckDevelopmentKit) which includes an interpreter and brainfuck to EmptyFuck converter.