FYI: An improved APL was released under the GPL.

["Kingsley G. Morse Jr." <kingsley@loaner.com>]

I'm happy to report that a great array programming
language was released under the GPL.

Its predecessor, APL, won the Association for
Computing Machinery's (ACM's) Turing award for its
elegant notation that makes it a "tool for
thought".

It's called "j".

If you happen to know a developer who's good at
math, who appreciates elegance, and who might be
willing to package j, please let them know it has
been GPL'd.

The source code is at

    http://www.jsoftware.com/source.htm

Thanks,
Kingsley