Plugins and mods
Dalamud plugins add features to Final Fantasy XIV while it runs. You install them from the Plugin Installer, which the /xlplugins chat command opens once the game is started through XIVLauncher.
Each plugin is built for one Dalamud API level. When Dalamud moves to a new level, plugins built for the previous one show (outdated) in the installer and stay off until their authors update them.
Mods from Nexus Mods replace the game’s models, textures and sounds on your own client and are loaded with Penumbra or TexTools.

Simulate crafts, create computer-assisted macros, and get mid-craft suggestions from the comfort of your own game!
Shows who is currently or was previously targeting you.
Warns you when yourself or others are missing role-specific actions

Complete combat countdown, pull timer and OBS overlay
Live monster data.
Extra job gauges
PvP, but in PvE!
Show your character's job, level, name, and other details in your Discord status.

Reveals your hitbox, with customisable features. Endorsed by world first raiders!
Time to finish your log?
Modifies in-game fly-text for more (or less) damage information.
Helps you fill out your Blue Mage Spellbook

Larger personal debuffs
Complete your Zodiac relic with style.
Because tracking your DoTs shouldn't be difficult.
Highlighting of Raises and detrimental status effects.
Displays enemies hp in enemy list.

The ultimate Ocean Fishing plugin.
A more versatile in-game map.
Replace names with job icons, raid role positions and more!
Eureka Tracker in a plugin with many other features.
Extends the game's built-in ready check.

Customizable ImGui hotbars
Mo' actions no problems
Improve your Bozja suffering. Maybe.
Lightweight job visibility in nameplates and chat.

Target distance widgets.
Displays debuffs (and more) on nameplates.
Track things inside Deep Dungeons (Solo only).
Customizable ring-shaped hotbars

PvP match history and stats tracker.
Simple mouseover and ground-targeting action integration

Gearing, simplified.
Never guess whether you'll make that positional again!
All you need for Raiding

Frustrated in a dungeon? Look at a cute cat girl!
Draw ants when things are off cooldown.
See Discord voice activity indicators directly on your party list.
Comprehensive monster dex for DeepDungeons
A plugin that ranks your performance based on your fundamentals in combat