AppleScript
Apple
AppleScript Home Page
AppleScript and Mac OS 9
AppleScript Guidebook
AppleScript Language Guide
Other
AppleScript Sourcebook
AppleScript 1.4.0 and 1.4.3
Great summary of information about AppleScript in Mac OS 9.0 and 9.0.4 MacScripter.net
Bill Briggs AppleScript Primer
OSA Menu
O'Reilly Network: Scripting Mac OS X
Third party utilities to turn a script into an application: DropScript, Pashua, and Platypus