Techtool Deluxe (APP) Universal Binary
TechTool Deluxe, which comes with the purchase of an AppleCare Protection Plan (APP), is now Universal Binary with the release of version 3.1.1:

http://www.micromat.com/index.php?option=com_content&task=view&id=166&Itemid=37

Description:
Updates TechTool Deluxe 3.0.x to version 3.1.1 for the AppleCare Protection Plan.

Changes:
  • Added support for Intel processor compatibility (Universal Binary).
  • Added support for Volume Structure testing of the current startup volume.
  • Added CD download dialog for Volume Structure failure on current startup volume.
  • Replaced Diagnostic and Rezero Unit tests and added Drive Hardware and Directory Scan.
  • Other minor changes and feature enhancements.
  • Updated localization.
NOTE: Version 3.1.1 requires Mac OS X 10.3.9 or greater.

For complete change list, see the ReadMe file.

Also available as a bootable disk image from Apple. Macintosh computer serial number validation required. As at July 29, download around 190MB for PowerPC version and 265MB for Intel version:
https://support.apple.com/techtooldeluxe/main?id=dl