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by arcfide 2397 days ago
Dyalog APL is also free (as in beer) and easy to install now that distribution has been streamlined. While I am biased, I consider Dyalog APL to be the premier APL interpreter and getting it is a matter of a few clicks on Dyalog's download page:

https://www.dyalog.com/download-zone.htm

1 comments

Nars2000 is also free as in beer and opensource, and is easy enough to install, and is nowhere near as comprehensive as Dyalog but interesting in its own ways (ball arithmetic, combinatorial functions, pi/prime number functions, simpler GUI)
NARS2000 is always doing some interesting stuff. Morten has said before that if he had to recommend an open-source APL, it would be NARS2000.