Showcase - Showcase of J in action
Essays: More text than code, these articles help you learn to think in J
Puzzles: Problems to exhibit & strengthen your J muscles
Articles: A collection of published articles on J
Books: Books on J
Gallery: J graphics gallery
Studio: Basic examples of J code
Guides - Beginners guides, FAQs, How-tos, etc.
FAQs: Frequently asked questions
Frameworks: Grid, JDB, Plot, Publish, etc.
Technologies: Web, Database, Interfaces
Community - J User Community