WinPcap is a great, free (gpl) Windows software, being part of the category Software utilities with subcategory Necessary Components.
It's available for users with the operating system Windows 95 and prior versions, and it is only available in English. The current version of the program is 4.1.2 and was updated on 6/2/2011.
Since the program was added to our catalog in 2011, it has managed to reach 182.757 downloads, and last week it gained 227 downloads.
WinPcap is a fairly light program that will not require as much storage than most programs in the section Software utilities. It's very heavily used in Indonesia, Egypt, and India.