This is a test Language List of all languages. The letters on the right indicate properties of the language; click on one for more details. (The letter indicating Turing-complete is the only one that works yet).
(Note: Not all languages are on this list yet, and the list itself is experimental.)
| .Gertrude | Depends on lengths of words in the source. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| .yacuabll | Language with single-character commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 0x29A | Mix of imperative and functional programming. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 1L | 2D language with only 2 commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 23 | By default, uses no non-whitespace characters. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 2iota | Turing tarpit based on events and alphabets. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 2L | 2D language with only 2 commands + NOP. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 3code | Functions limited to 3 local and 3 global variables. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| 4DL | Stack-based 4D programming language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| AAAAAAAAAAAAAA!!!! | Programs consist of nothing but A and punctuation. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ABCDXYZ | Based around the first BackFlip storage pattern. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ADJUST | 2D language with no NOP characters. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Aheui | Fungeoid based on the Korean alphabet. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Ale | Brainfuck-like language with two tapes. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ALPACA | Metalanguage for describing cellular automata. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| AlPhAbEt | Bit-based language with double-ended queues. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Archway | Brainfuck-like; wire-crossing not necessary. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Argh! | Funge with 27 commands and an unlimited stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Aargh! | An attempt to make Argh! Turing-complete. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Aura | All operators output by editing the next instruction. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| AutoMouse | Screen-scrubbing utility that can be programmed. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| axo | A Befunge variant that uses punctuation marks. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BackFlip | All commands selfmodify; no data storage. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Bag | Fractran extension based around n->np/q. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BAK | Programs work by creating pointers to themselves. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Bear Food | A cross between Forth, False, and Perl. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Beatnik | Commands are based on Scrabble scores. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Befreak | A completely reversible fungeoid. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Befunge | The original fungeoid; designed to be uncompilable. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Portia | Preprocessor for use with beta-Juliet. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BF-SC | Brainfuck limited to always terminate. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Biota | The first 2D programming language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BIT | Only types used are bits and pointers to bits. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BitChanger | 4-instruction bitwise Brainfuck derivative. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BitChip | Programs are based on moving and adding squares. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Black | One command + NOP, no data storage. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Blank | One-dimensional Befunge-like language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| BogusForth | Language inspired by Forth and False. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Boolfuck | Bit-based Brainfuck isomorph. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Brackets | Uses only brackets as commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Braincopter | System for storing Brainfuck code in images. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Brainfork | Brainfuck with multithreading extensions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Brainhype | Brainfuck with halting-problem analyser. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Brainloller | Brainfuck mapped to colours and stored in images. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Braintwist | Brainfuck with extensions for self-modification. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Bub | Brainfuck with GOTO instead of while. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Bubble | Language based on the bubble-sort algorithm. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Bullfrog | Language with no conditional jumps. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Camouflage | Language based around "disguises" for commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| CAT | Thematic language based around cats. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Catch | Language based around exceptions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Chef | Programs resemble cooking recipies. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Choon | Language which outputs only in musical notes. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Cvlemar | Language in which all programs are graphs. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Dis | Easier-to-use Malbolge variant. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Dumbf*ck | Brainfuck-derived language with unusual looping. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| DZZZZ | Language with a diagonal control flow. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Emoticon | All program instructions look like smileys. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Enema | Blank-inspired self-redefining language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ETA | Language where only ETAOINSH are commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| eTalk | Designed to look like natural language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| False | Early esolang with 1 KiB compiler. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Flip | Wierd-inspired billiards-like 2D language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Fm | Brainfuck-like computational model. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Forte | Language based on altering the value of constants. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Fortuna | Brainfuck based around the idea of a wheel. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Fromage | Ten instructions; each operates on a single bit. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Fugue | Prelude with a musical representation. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Gammaplex | High-level language with graphics and mouse input. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Glass | Object-oriented postfix language that uses a stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Glypho | Pattern-based language with a rotatable stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| GOTO++ | Language with compulsory GOTO usage. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| GraNoLa/M | Directed graphs are the only data type. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Gravity | Uncomputable language based around collisions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Haifu | Language designed around Eastern philosophy. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Hanoi Love | Minimal language named after the Towers of Hanoi. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Hargfak | Brainfuck with two pointers and code-blocks. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| hcbf | Four-dimensional Brainfuck variant. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| hexish | Language designed to look like hexadecimal. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Homespring | Excessively high-level salmon-based language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| iag | Three-command, >3 operation language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| IINC | Language in which lines have values. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ILLGOL | BASIC, Fortran, and INTERCAL-like language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| INCAL | Language with cellular-automata as operators. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| INTERCAL | Designed in 1972 to be unlike any other language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Iota | Functional language with one predefined function. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| itflabtijtslwi | /// with input extensions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Java2K | Language where any command could malfunction. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Jot | Iota where any combination of 0s and 1s is legal. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| JUSTIF | Only control structures are IF and recursion. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Kayak | Reversible language based around stacks and bits. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Kipple | Minimalistic stack-based language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| kvikkalkul | Alledgedly created by the Swedish navy c. 1950. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| L00P | No control structures except IF and an implicit loop. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| l33t | Based on numbers embedded within words. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Lambda | Minimalistic lambda-calculus inspired language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Lazy K | Purely functional lazily-evaluated Unlambda update. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Linguine | Spaghetti with no bounds on data storage. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| LNUSP | 5-command PATH-variant with better orthogonality. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Magenta | Needlessly redundant cursed language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Malbolge | Designed to be impossibly difficult to program in. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| MDPN | Two-dimensional grammar-description language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| MechaniQue | Language used to write interactive fiction. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| MiniMAX | Self-modifying language with a 14-byte interpreter. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| MinISCule | OISC variant with a 36-byte interpreter. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| MISC | Only command is 'subtract and branch if negative'. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Mouse | Early False-like automation language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Muriel | Language that can only loop by quining itself. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Mycelium | Image-based language with memory and a stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Network Headache | Variables are shared between all running programs. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| noit o' mnain worb | Language based around Brownian motion. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| nouse | Control flow depends on the current stack size. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| NULL | 0D language based on prime factorization. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Numberix | Language that looks like hexadecimal digits. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| NUMPAD | Language where letters are interpret as numbers. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Nybbleist | Language based on 4-bit nybbles. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Obfuna | All instructions are unary operators. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Object disoriented | OOP where all objects have 2 data and 1 method. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ObjectPar | Language that uses nothing but objects. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ODDBALL | Matrioshka language describing bully automata. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| OISC | Group of languages each with only 1 instruction. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Omegaplex | Gammaplex update with similar capabilities. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Omgrofl | All commands are Internet slang abbreviations. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Oof! | Language based on collisions between commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ORK | Highly verbose object-oriented language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Oroogu | Language based around multiple queues. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Orthagonal | Language based around a grid and a stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Orthogonal | Orthagonal update with extra instructions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Owl | BogusForth update with integer math instructions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| P | Stack-based language capable of file manipulation. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| PATH | 2-dimensional Brainfuck-based language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| pbrain | Brainfuck with procedure definition extensions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Petrovich | Language based around award and punishment. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Piet | Graphical language resembling abstract paintings. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Piet-Q | Piet variant based around RGB rather than hue. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| PingPong | Fungeoid with reflection as a flow-control method. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Please Porige Hot | Based around the rhyme with the same name. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| POGA-INTERCAL | INTERCAL update that's easier to compile. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Pointy | Language with the pointer as the only data type. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Prelude | Language with several 'voices', each with one stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| PROLAN/M | Deterministic Thue-like rewriting language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Q-Bal | Language based on queues rather than stacks. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Qdeql | Language with one queue and few commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| QUATRE-CALC | Based on pouring cans into each other. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Rail | 2D language with functions and a library. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Reaper | OO language in which only destructors do anything. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| RedGreen | Cellular automaton designed as a RUBE update. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| REGXY | Regular expression-based rewriting language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| reMorse | Language designed to resemble Morse Code. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Revaver2pi | Revaver update with infinite stacks. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| REverge | Language based around data replacements. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| REVERSE | Reversing is the only control flow operation. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Rhotor | Lazy functional language with pattern matching. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| RUBE | Bully automaton where data is moved by machines. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SADOL | Functional language designed to be illegible. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Sally | Forward-Polish strongly typed Forth-like language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Sansism | Brainfuck adapted to more than one dimension. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SARTRE | Language where programs have no purpose. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Sceql | Qdeql with a nondecreasing stack. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Shakespeare | Programs resemble Shakespeare plays. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Shelta | Language inspired by Forth, False, and Assembler. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Slashes | Language based around search-and-replace. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Smallfuck | Bounded-storage bit-based Brainfuck variant. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SMATINY | Reversible SMETANA update with output. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SMETANA | Language based swapping lines and GOTO. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SMITH# | Cut-down SMITH with multiple input formats. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SMITH | Language with no loops, only selfmodifying code. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SNUSP | More orthogonal and concrete PATH variant. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Sorted! | Bilingual; all programs are 14 statements long. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Sortle | Uses insertion sort and renaming expressions. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Spaghetti | Programs can have randomly ordered lines. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Spiral | 2D language based around spirals. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| SPL | Brainfuck with arithmetic and strings. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Spoon | Huffman-coded Brainfuck variant. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Star W | Language based on many different non-esolangs. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Strelnokoff | Language where lines are executed randomly. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Subskin | OISC variant which uses skips rather than jumps. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Subtle cough | Unlambda with call/cc as the only primitive. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Tamerlane | Based around a constraint-flow paradigm. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TapeBagel | Language based around arrays of 3 integers. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Taxi | Thematic language based around a taxi. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| THRAT | Brainfuck extension with a 2-character notation. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Threaded INTERCAL | INTERCAL with multithreading via COME FROMs. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Thue | Turing tarpit based on string-rewriting. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Tiny | Reverse-Polish language using only assignments. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TMMLPTEALPAITAFNFAL | Language that changes its syntax every day. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Toadskin | Minimal language based on Brainfuck and Forth. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Tory | Language that resembles Tory election pledges. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TRANSCRIPT | Programs resemble IF transcripts. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Trigger | Language based around patterns in the source file. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TriINTERCAL | INTERCAL modified to use base 3 values. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| True | False without random-access storage. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TURKEY BOMB | Data can have fractional, negative, or infinite size. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Twimp | No numeric storage; asymmetrical I/O. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| TwoDucks | Language based around Time Travel. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Udage | Pattern programming; data type is a bit+pointer. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Unassignable | Reversible OOP language with no recursion. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| UNBABTIZED | More elaborate Brainfuck with arithmetic. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Unlambda | Eager functional combinatory logic language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| var'aq | Programming language written in Klingon. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Version | Language based around ignorance-spaces. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Wait | The current time is used as the program source. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| When | Statements trigger on variable changes. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Whenever | Statements can be executed in any order. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Whirl | 24 statements encoded using 0 and 1. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Whitespace | The only characters used are space, tab, newline. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Wierd | Based on sharpness and angle of corners of a line. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| YABALL | Brainfuck with a more obscure control flow. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Yellow Four Code | Based around being confusing and useless. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Ypsilax | 2D nondeterministic rewriting language. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ZOMBIE | Language designed for evil necromancers. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| Zot | A version of Jot with added I/O. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N | 
| ZT | Diagonal control flow affects commands. | L | M | J | I | F | R | O | Y | N | ? | U | T | L | P | F | ? | Y | N | 0 | 1 | 2 | + | I | U | Y | N |