Windows Resource Kit (1991) 43 Utility Windows

The Microsoft Windows Resource kit is a set of supplementary tools for managing and deploying Microsoft Windows. The first Windows Resource kit was released in 1991 for Windows 3.0. Most, but not all, Windows versions after that had corresponding Resource Kits. These were often freely downloadable from Microsoft.

• 3.x
• 95
• NT 4.0
• 98
• 2000

Windows SDK & DDK (1986) 50 Windows

The Microsoft Windows Software Development Kits (SDK) provide sample program code, extra libraries, and documentation to aid application developers producing Windows applications. Microsoft Windows Driver Development Kits are similar sets of samples and libraries but specific to device driver development, and much more in-depth.

• Windows 1.x
• Windows 3.0
• NT 3.x
• Windows 3.1
• WfW 3.11
• Windows 95
• NT 4.0
• XP (NT 5.1)
• 2003 (NT 5.2)

Windows Whistler (1999) 171 Windows

Windows Whistler was the pre-release codename for Windows XP, or NT 5.1. It is the successor to Windows 2000. XP was the first that did not compete against a DOS based version of Windows, effectively finally unifying the Windows line in to a single pure 32-bit product. Below are various Beta releases. Winworld does not host the final RTM versions.

• Early Whistler
• Beta 2