Item Despawn Timer
Shows a timer above dropped items, letting you know when they're going to despawn. Handy for preventing items from despawning, because you didn't know they're about to despawn.
Fabric users: Install Mod Menu to access the config screen (when using v0.2.0 or newer)
Mod is needed on the server due to Minecraft not communicating to clients of when the item is going to despawn, causing an inaccurate timer.