Disk Space Explorer is a good, free (gpl) Windows software, belonging to the category Software utilities with subcategory Disk (more specifically Disk Analysis).
More about Disk Space Explorer
Since the program has been added to our selection of programs and apps in 2005, it has already reached 3,141 downloads, and last week it had 8 downloads.
Disk Space Explorer is a not that heavy program that doesn't need as much free space than many software in the category Software utilities. It's very heavily used in many countries such as Poland, Czech Republic, and India.
Its current version is 1.1 and its last update happened on 12/16/2005. It's available for users with the operating system Windows 98 and prior versions, and you can get it in English.