gnu-apl (Free APL interpreter)

GNU APL is a free interpreter for the programming language APL.

The APL interpreter is an (almost) complete implementation of ISO
standard 13751 aka. Programming Language APL, Extended.

The APL interpreter has implemented:
- nested arrays and related functions
- complex numbers, and
- a shared variable interface

GNU APL was written and is being maintained by Jürgen Sauermann.