Rainmeter is a customizable performance meter, which can display the CPU load, memory utilization, disk space, network traffic, time and many more things.

CrystalDiskInfo is an HDD utility which allows you to view details about your hard disk drive.

Process Explorer shows you information about which handles and DLLs processes have opened or loaded.

Sysinternals Troubleshooting Utilities have been rolled up into a single Suite of tools. This file contains more than 60 of the individual troubleshooting tools and help files. It does not contain non-troubleshooting tools like the BSOD Screen Saver or NotMyFault.