APL White Pages
A directory of many serious APL users all over the globe
Jim Weigang's APL Information
Many articles, programs, definitions, and links.
Présentations AFAPL
Part of the site of a French speaking APLer.
Rex Swain's Home Page
Many articles of interest to new and old APLers, an interesting smattering of information on other languages (REXX, Perl, HTML), and much other information. A site of interest not only to APLers, but to many computer users!
Sam Sirlin's APL Page
Useful APL information and links. Particularly interesting is the APL c compiler project, based on T. Budd's original work.
Timothy A. Budd home page
The creator of Little Smalltalk does APL too.
Yoshi's APL Page
APL and Japanese Language and Japanese Market.