Free APL Compilers and Interpreters

Compilers and Interpreters for the APL Programming Language

Free APL Interpreters and Compilers

APL is a high level, concise, array-oriented programming language that uses pictorial symbols for its language constructs rather than the usual ASCII-based words in other languages. It is sometimes used in statistics and scientific applications, among other things. (See, for example, the selection of books on APL on Amazon for the types of software APL is frequently used for.)

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Free APL Compilers and Interpreters

NARS2000 New

NARS2000 (where NARS stands for Nested Arrays Research System) is an experimental APL interpreter used as a testbed for new ideas in the language. Besides being ISO/IEC 13751 Extended APL compliant, the interpreter also includes new functions, operators, data types, etc. The program runs on Windows as well as on Linux via Wine (see Free Windows Clones, Emulators and Emulation Layers for more information about Wine, if you don't know what it is). The code for the project is mostly licensed under the GNU General Public License, although some components are released under different licences.


J is a programming language in the APL language family. Unlike APL, it uses ASCII characters. It is useful in mathematical, statistical and logical analysis of arrays of data. The software comes with an IDE, standard libraries, utlities, a form designer, and supports an event-driven GUI for your application, integrated 2D and 3D graphics, memory mapped files, and interfacing with other programming languages. Supported systems include Windows, Linux, Mac OS X, SunOS, AIX, StrongArm PocketPC, and Mips PocketPC. You may use it free only if you are a student; otherwise you have to pay an annual fee (licence expires annually; see their site for the full licence).

APL Special Edition

APLSE is a freeware version of APL*Plus PC, a compiler for the APL programming language, a highly symbolic language (ie, it uses pictorial symbols rather than the traditional English words) and compact language.


According to its website, "A+ is a descendent of the language 'A'". Unlike APL, A+ is "geared" to business, supporting large capacity and high performance, with the "+" referring to the "electric graphical user interface". It is released under the GNU General Public License. Supported platforms include Linux, FreeBSD, AIX, IRIX, Mac OS X, NetBSD, Solaris, and Tru64.


This package, for Linux, FreeBSD, OpenBSD, Mac OS X, and POSIX/Unix-like systems, includes the APL font as well as the interpreter for APL11. You will have to compile it from the sources provided.


Select the FreeAPL link on the linked page for what is apparently a Windows version of APL\11.

APLX for Linux (Personal Edition)

APLX for Linux Personal Edition is an APL development system. The old version linked to above is free for non-commercial use. You will have complete a download request form before you can get the software.

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