Kernel-Mode Driver Framework (KMDF) is a software framework developed by Microsoft to assist developers in building Windows kernel-mode device drivers. It provides a set of abstractions and tools that help simplify driver development, including support for features such as power management, Plug and Play, and device synchronization. KMDF also helps ensure driver stability and reliability by providing built-in error handling and exception handling mechanisms. As a specialized skill, it is essential for those working in the field of Windows driver development.