Introduction to JavaScript
Beginner's JavaScript
Differences between Java and JavaScript
Introduction to JavaScript, Part 1 and 2

Netscape's Documentation
JavaScript Documentation
JavaScript Authoring Guide
List of Known JavaScript Bugs

Programming Help
Advanced JavaScript Programming
Ask the JavaScript Pro
JavaScript 411
JavaScript Resource Center
JavaScript Tip of the Week, from Webreference
The JavaScript Workshop
JavaScript World!
JavaWorld's JavaScript column by Gordon McComb
Jscript, Microsoft's counterpart to JavaScript
Live Software

Applet Collections
a2z: JavaScript Yellow Page
DryRoast
Gamelan
Javascript Planet
Javascripts.com

Newsgroups (Requires news server access)
comp.lang.javascript