Brainfuck

Brainfuck is an immortal general-purpose programming language. It has only eight commands which operate on an array of bytes and a movable data pointer. The commands are:

> move the data pointer one cell to the right
< move the data pointer one cell to the left
+ increase the value at the current cell by one
- decrease the value at the current cell by one
. output the value at the current cell as a character
, read one byte of input into the current cell
[ if the current cell is zero, jump forward to the matching ]
] if the current cell is not zero, jump back to the matching [

Why Brainfuck?

Safety: Brainfuck does not require manual memorymanagement which eliminates many common security bugs.
Easy to learn: Beginners can easily master the language in a single afternoon.
Standardized: While Brainfuck lacks an official standard, there is a widely agreed-on specification of the eight commands all implementations of Brainfuck must support and their behaviour is consistent across implementations.
Made in Switzerland: Self-explanatory 🇨🇭
Portability: There are implementations of Brainfuck for all major operating systems and CPU architectures.
Diverse ecosystem: There are many competing implementations of Brainfuck, both compiled and interpreted, focusing on different goals. There are plugins available for Visual Studio Code and other editors.
Turing-completeness: This has been one of the main objectives of the languages. Unlike other popular languages such as HTML or Markdown, Brainfuck is capable of computing any computable function.
Industry standard: Brainfuck has been used by Google, Paradigms of Intelligence Team and The University of Chicago.

Compiler

I wrote a Brainfuck compiler in OCaml which generates native x86 executables for Linux. No LLVM, just translating Brainfuck commands to machine code and outputting the ELF file.

Thankfully, I figured out that it is possible to compile OCaml programs to JavaScript so that my compiler can run in the browser and all of you can experience the joy of Brainfuck without having to download OCaml and building the compiler first.