NirSoft web site provides a collection of small and useful freeware utilities for Windows, all developed by Nir Sofer. Nir is an experienced developer with extensive knowledge in C++, .NET Framework, Windows API, and codes all applications in his free time. Most of the utilities were developed in C++, and do not require any installation. You can run all tools from a USB drive using the command-line and most importantly, they do not write anything to the Registry and profile folder! You can download Password recovery, Network monitoring, Desktop, Disk, System and many more utilities for your Windows systems.
Go here to read more and download these tools - http://www.nirsoft.net/utils/index.html