users@racket-lang.org — a discussion list for all things related to Racket. Ask your questions here! (Subscribe or browse, also via Gmane and Google Groups.)

announce@racket-lang.org — a low-volume, moderated list for announcements, only. (Subscribe or browse.)

dev@racket-lang.org — a mailing list for PLT Scheme development, for the people who want to see how the sausages are made and help make them. (Subscribe or browse; also on Gmane.)

#racket on freenode.com — an informal discussion channel for all things related to Racket.

Schematics Scheme Cookbook — useful recipes, many of which apply to Racket.

How to Design Programs — a textbook for introductory programming, but also worthwhile for experience programmers who are new to “functional programming.”

Programming Languages: Application and Interpretation — a textbook on programming languages.

TeachScheme! — a workshop to train teachers using How to Design Programs in the classroom.

Blog — announcements, helpful hints, and thoughtful rants.

People — the people behind Racket.

Development Repository (also available on GitHub)

Pre-built development installers and Other Pre-built Resources.