Inventory HUD+ allows you to see much more than standard Minecraft allows with displays. You can now see what armor, weapons, and tools you’re carrying as well as how damaged they are. It’ll even show the total arrows you have available. And you can see a floating display of everything in your inventory right on your main screen.
The great thing about this mod is how customizable these options are. You can turn certain ones off completely or simply move them around the screen where you see fit. Just hit CMD+i (or CTRL+i) and the overlay GUI pops up.
Or you can make the displays vertical and smaller if that better suits you. This option is available from the main menu screen mod config page.