General APL Resources

Here are a few places to learn about APL:

The APL Wiki
Vector Magazine
Chasing Men Who Stare at Arrays

Dyalog APL Resources

Free Download of Dyalog APL
Download APL Font
Download APL Keyboard driver for 32 bit Windows
Download APL Keyboard driver for 64 bit Windows
Educational, Personal, and Commercial Versions
Mastering Dyalog APL
Dyalog APL Manuals and On-Line Help
Conference and Other Videos

Cool or Strange Stuff

Conway's Game of Life in APL
Palindromic Expression for Phi in APL
The Story of TryAPL

Social Media and Forums

Dyalog Forums
comp.lang.apl newsgroup (via Google Groups)