'Mb-Ruler', and 'Sea Tools'

Mb-Ruler

MB-Ruler helps you to measure distances and angles on the screen. The ruler is almost transparent, so you can have it on the screen, while you are working with the applications below. Additionally it has a screen loupe function, a RGB value window and you can place temporary points, lines, rectangles, ellipses, polylines, texts and bitmaps as markers on the screen. For software developers MB-Ruler has a remote interface to modify its position and angle and receive its data.

http://www.markus-bader.de/MB-Ruler/

Sea Tools

SeaTools for Windows is a comprehensive, easy-to-use diagnostic tool that helps you quickly determine the condition of the disc drive in your external hard drive, desktop or notebook computer. It includes several tests that will examine the physical media on your Seagate or Maxtor disc drive and any other non-Seagate disc drive.

http://www.seagate.com