SIGAPL is the ACM's special interest group devoted to APL.

special interest groups APL & J

The French Association for the promotion of APL

Some interesting APL links here, but they have to be found.

Great APL site, specially if you speak Finnish. However, there is much in English also, particularly the very famous FinnAPL Idiom Library.

Contains committee listing, membership details, a current members listing, and contacts.

Find other organisations here.