List of open-source array languages

This page lists array language implementations whose source is available under an open source (including copyleft) license.

APL dialects

Language	License	Implementation	Source
A+	GNU GPLv2	C++	GitHub (mirror)
April	Apache 2.0	Common Lisp	GitHub
Co-dfns	AGPLv3	Dyalog APL	Github
dzaima/APL	MIT	Java	GitHub
GNU APL	GNU GPL	C++	GNU Savannah
KAP	MIT	Kotlin	GitHub
NARS2000	GNU GPL	C, APL	SourceForge
ngn/apl	MIT	Javascript	GitHub (mirror)
openAPL	GNU GPLv2	C	GitHub (mirror)

Although all versions of K itself are proprietary, there are several open source implementations of K or related languages.

Language	License	Implementation	Source
Klong	Public domain / CC0	C	Download zip file
Kona	ISC	C	GitHub
ngn/k	GNU AGPLv3	C	Sourcehut
oK	MIT	Javascript	GitHub
kuc	GNU GPLv3	C	GitHub

Language	License	Implementation	Source
Aplette	GNU GPLv2	C	GitHub
BQN	ISC	BQN, JavaScript	GitHub
dzaima/BQN	MIT	Java	GitHub
I	ISC	C	GitHub
Ivy	3-clause BSD	Go	GitHub
J	GNU GPLv3	C	GitHub (mirror)
Jelly	MIT	Python	GitHub
RAD	MIT	D	BitBucket

APL dialects [edit]
Maintained	APL+Win ∙ APL2 ∙ APL64 ∙ APL\iv ∙ Aplette ∙ April ∙ Co-dfns ∙ Dyalog APL ∙ Dyalog APL Vision ∙ dzaima/APL ∙ GNU APL ∙ Kap ∙ NARS2000 ∙ Pometo ∙ TinyAPL
Historical	A Programming Language ∙ A+ (A) ∙ APL# ∙ APL2C ∙ APL\360 ∙ APL/700 ∙ APL\1130 ∙ APL\3000 ∙ APL.68000 ∙ APL*PLUS ∙ APL.jl ∙ APL.SV ∙ APLX ∙ Extended Dyalog APL ∙ Iverson notation ∙ IVSYS/7090 ∙ NARS ∙ ngn/apl ∙ openAPL ∙ Operators and Functions ∙ PAT ∙ Rowan ∙ SAX ∙ SHARP APL ∙ Rationalized APL ∙ VisualAPL (APLNext) ∙ VS APL ∙ York APL
Derivatives	AHPL ∙ BQN ∙ CoSy ∙ ELI ∙ Glee ∙ I ∙ Ivy ∙ J ∙ Jelly ∙ K (Goal, Klong, Q) ∙ KamilaLisp ∙ Lang5 ∙ Lil ∙ Nial ∙ RAD ∙ Uiua
Overviews	Comparison of APL dialects ∙ Timeline of array languages ∙ Timeline of influential array languages ∙ Family tree of array languages