DeviceKit
DeviceKit is a modular hardware abstraction layer designed for use in Linux systems that is designed to simplify device management and replace the current monolithic Linux HAL. DeviceKit includes the ability to enumerate system devices and send notifications when hardware is added or removed from the computer system. In May 2008, HAL developer David Zeuthen announced his intention to deprecate HAL, mainly because of its complexity and redundancy with other libraries in the Linux environment.