Playerlist
Fleckenstein

Show a list of all online players (similar to minecrafts tab-list) when a player is sneaking.

HUD bars
Wuzzy

Replaces the default health and breath symbols by horizontal colored bars with text showing the number. Extensible.

HUD Timers
LMD

A lightweight library for adding hud timers.

Hunger with HUD bar
Wuzzy

This mod adds a simple hunger mechanic (plus HUD bar) to the game. Eat food to avoid starvation, be sated to regenerate health.

Armor HUD bar
Wuzzy

Adds a HUD bar displaying the current damage of the player's armor.

WorldEdit HUD Helper
Starbeamrainbowlabs

Displays the name of the node you're looking at & your rotation in your HUD. Banish the debug text forever!

Minimap Radar
OgelGames

A simple mod that enables the use of the minimap radar with a craftable item

Hunger NG
Linuxdirk

Hunger NG is a mod for Minetest adding a very customizable and easy to extend hunger system.

HUD Compass
kestral

Optionally place a HUD compass and 24-hour clock on the screen.

Inventory Icon
Wuzzy

Shows a backpack icon in the HUD, which shows how many slots are available and free in the player inventory and equipped bags (if available).

Time, Lag and Position HUD display
orwell

Displays some information in the bottom-right corner of the screen.

advmarkers
luk3yx

Allows you to create and manage markers/waypoints.

mTimer
Linuxdirk

Ingame timer for showing current playtime, current day time, ingame time, etc.

Kill History
LMD

Adds a kill history

Basic HUD textures
Wuzzy

Adds basic but neccessary HUD images: Heart icon, bubble icon, … (for game authors)

WiTT
MightyAlex200

Small indicator to show what the player is looking at.

HUD Notify
ANAND

Shows a message to a player in-game, by means of an HUD element.

HUD Title
Miniontoby

A HUD Title mod