NirSoft web site provides a unique collection of small and useful freeware utilities, all of them developed by Nir Sofer.
If you are looking for Windows password-recovery tools, click here.
If you are looking for network tools, click here.
To view your IP address and other information, click here.
To view all major IP address blocks assigned to your country, click here.
To read the Blog of NirSoft, click here.
To download a package of all NirSoft utilities (Updated every week), go to this Web page.