The Apple Help Software Development Kit is now available from:

Apple Help is Apple’s new help technology for use in Mac OS 8.6 and
forthcoming OS releases. Apple Help provides a lightweight HTML rendering
engine capable of displaying HTML 3.2 content together with integrated
QuickTime media, AppleScript automation, and full-text searching based on
Sherlock technology.

The SDK includes technical documentation about the Apple Help system, the
tools you need to create or convert to Apple Help, as well as sample
implementations, a tutorial, and style guidelines.

For additional information and other resources see: Mac OS Help Technology
Web site

(Note: The Web is not yet reachable, but will be active soon. The SDK is
available now at the FTP site.)

–The Apple Help team