Catomon

Highlights your name and custom words in chat, changes message color, and plays sounds

Customize and display pop-up emotes above your character's head

Quickly adjust spawn rate, ban bad mobs, change mob limit and more with in-game menu

Psychopaths hiding among villagers

Villagers scream "No no wait" meme when hurt

Quickly access & pin GuideMe, Patchouli and other guides/documentations via buttons in your inventory

Prevents placement of the last torch/lantern from offhand

Plays "scream and disappear" meme sounds when a player dies

Adds third person effect on player's death and prevents chunks from unloading when you are dead

Shows tick statistics via gui & detects server freeze (0 TPS)

Players and villagers make a Kirby fall scream meme sound when falling to death

Slows stone mining depending on neighbor block count to make cave exploring more viable. Also has global mining speed modifier.

Plays Touhou death sound on player death & changes xp orb texture to blue points

Adds screen blacklisting to the What Are They Up To mod

Pop-up Emotes addon that lets you use and see emotes on vanilla servers

adds survival /fly and disables digging speed penalty, has fly resource feature that's off by default

Make structures generate only once (configurable)

Minecraft 26.2 minibuttons (backport?) but with more features

Adds permadeath option that deletes the world if you die