AplsAndRelatedLanguages
[http://aplusdev.org/ A+] is fast interpreter supporting a subset of APL (no complex numbers) with POSIX extensions.
[http://www.jsoftware.com/ J] is a modern, high-level, general-purpose, high-performance programming language, ASCII based, born by the brain of APL's creator Turing Award professor Ken Iverson.
[http://www.nial.com Nial] is a melding of APL and Lisp.
[http://numpy.scipy.org NumPy] is an APL inspired extension to the [http://python.org Python] programming language.