Dota 2 HUD mods
The bar along the bottom and the panels around it. Valve sells HUD skins; these replace them locally.
The D2PFX catalog has 15 mods in this category. Each changes what you see on your own screen; everyone else sees their own game.
Default Lite Hud
Horror Black Hud
Gotohouse Hud
Void Hud
Total Black Hud
Ken Kaneki Hud
Anime Hud
Kawaii Hud
Crimson Hud
Twilight Hud
Purple Hud
White Sora Hud
Green Hud
Black Hud
Blue Web Hud
Installing any of these
Open Dota 2 Mod Manager, find the hero, press Install. The app puts the file in a free pak slot in the folder your game mounts, tells you when two mods carry the same file, and puts everything back after a Dota patch. The full guide, or the manual route if you would rather do it yourself.