A tacit array programming language

🧩 Shape-Safe Symbolic Differentiation with Algebraic Data Types

A functional, flexible and concise Lisp.

Scientific computing with Perl

An introduction to the J programming language that gets to the point.

💐 j is a subset of J, and an essay.

k interpreter

N-dimensional / multi-dimensional arrays (tensors) in Scala 3. Think NumPy ndarray / PyTorch Tensor but type-safe over shapes, array/axis labels & numeric data types

Amber is a small, fast, self-contained array language with the working vocabulary of q/kdb+ — dictionaries, tables & keyed tables with ([]…) literal syntax, the full join family (left · inner · union · plus · equi · as-of · window), qSQL-style select/by, strings, intraday tick / OHLC temporals, and column attributes implemented in C.

Online REPL for BQN

Probabilistic programming with vectorized programmable inference

APL machine learning library

emacs major mode for working with ngnk

Memory-safe clean-room Rust reimplementation of NumPy with strict/hardened compatibility modes, deterministic stride calculus, differential conformance harnesses, and RaptorQ durability artifacts.

A basic Lisp interpreter implemented in Elixir.

Emacs mode for uiua, a stack-based array language

Interpreter in Fortran that can handle scalars and 1D arrays, with access to intrinsics and statistical functions and plotting with gnuplot

Python scripts to transpile Python, R, Octave, or C to modern Fortran, mark Fortran procedures as pure or elemental, add argument intents, transform loops to array operations, and make other changes

Ari: Goal language extended with SQL and more