Mod Spotlight: AdvancedHUD
With AdvancedHUD, you can have full personalization of your screen, allowing you to put whatever you want, wherever you want! It even goes as far as letting you disable certain things, like your health bar (I mean, that’s not important or anything, right..?) If you’re a full-time Slime whomper, just set everything to fade and enjoy undistracted Slime slaughter! Who knows, you just might even be able to recreate the HUD from your favorite RPG!
AdvancedHUD for 1.2.5 (Minecraft Forums)