This addon adds a combat HUD to your UI, showing player/target/pet hp and mana/rage/whatever as rings centered on your screen. It uses the StatRings code originally made by Iriel but later modified by Antiarc. It also shows a small target frame with textual hp/mana as well as a 3D target model for other players. It has support for FlightMap destination timers and also have a casting bar with spell text and timer. If the casting bar is enabled it will hide the default Blizzard casting bar.
Once installed you can access ArcHUD options by typing /archud or /ah in the chat window.
Совершенно лень переводить, язык очень простой.