use sometime

Lets you see if players are typing, in a GUI, idle, with cool ingame visuals

Enhances Minecraft's ambience with hand-crafted visual effects like fireflies, falling leaves, and waterfall cascades

Tools to aid in datapack creation

Adds simple, vanilla-like furniture to the game

Adds a wide variety of health conditions and diseases to the game, which you can treat with various different treatments.

A mod that aids in the development of world generation data packs and mods. Allows reloading worldgen data packs in-game and resetting chunks. Colors jigsaw blocks by name and target.

A data pack that adds the Stardew Valley Fishing Minigame whenever a fish or other item would normally be fished. Credit to SethBling for the mechanics 4 years ago

A plugin (and now MOD) that will help you with data pack creation. It can generate NBT and JSON advancement areas with a world edit-like tool.

A Minecraft mod for enhancing your cat pets