Esolang topic
An esoteric programming language, or "esolang", is a computer programming language intended to entertain or confuse, to be a joke or to explore new concepts. Esolangs may be minimalistic or, conversely, bloated. Often an esolang has features that made it harder to use on purpose. Esolangs are mostly not designed for serious use, unlike mainstream languages.
awesome-esolangs
Curated list of awesome Esoteric languages and resources
esofiles
The Esoteric File Archive
flip-jump
The single instruction language - Flip a bit, then Jump
Entropy
Compiler for Entropy, a programming language where all data is in a constant state of decay
Folders
A language where the code is written with folders
BIPLAN
Byte coded Interpreted Programming language
MATL
A programming language based on MATLAB and suitable for code golfing
fetlang
Fetish-themed programming language
asciidots
Esolang inspired by ASCII art