Fonality HUD is a business tool that connects phones, desktops, and applications into a single, easy-to-use interface to streamline communication and collaboration. It provides features like drag and drop call management, visual call parking, seamless mobility, and employee presence. Additionally, it offers contact center functionality including unlimited queues, real-time SLA metrics, monitoring/whispering/barging on calls, and options for recording calls either all or on the fly.