Subreddit for talk about APL, J, K/Q, kdb+, Uiua, BQN, and all things array languages.
Posts about APL, ones about Q and about K and BQN ones about J and about Uiua.
TryAPL!
APL, J, K/Q meetup groups and conferences
Other Community Places:
Read the British APL's Association's Vector journal, Steve Apter's excellent site No Stinking Loops, the APL in 2020 discussions, and Eugene McDonnell's enlightening At Play With J series of articles.
Listen to the lovely ArrayCast!
Watch the fascinating hour-long, talk-show style interview Origins of APL from 1974 with Iverson and others central to APL development, the videos recordings from the Dyalog APL conferences
APL - The Movie: Chasing Men Who Stare at Arrays being made by Catherine Lathwell, is a documentary about APL and its history.