The Sysinternals web site was created in 1996 by Mark Russinovich and Bryce Cogswell to host their advanced system utilities and technical information. Microsoft acquired Sysinternals in July, 2006. Whether you’re an IT Pro or a developer, you’ll find Sysinternals utilities to help you manage, troubleshoot and diagnose your Windows systems and applications.

All these applications are now also available to you online, 24/7, without you having to download them. From the Windows SysInternals Homepage:

We’re excited to announce the beta of Sysinternals Live, a service that enables you to execute Sysinternals tools directly from the Web without hunting for and manually downloading them. Simply enter a tool’s Sysinternals Live path into Windows Explorer or a command prompt as \\live.sysinternals.com\tools\<toolname> or view the entire Sysinternals Live tools directory in a browser at http://live.sysinternals.com.

If you are unfamiliar with Microsoft Windows Sysinternals, it is highly recommended that you visit the website at http://technet.microsoft.com/sysinternals before using these tools.