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 mobs, change mob limit and more with in-game menu

Psychopaths hiding among villagers

Villagers scream "No no wait" meme when hurt

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

Prevents placement of the last torch/lantern from offhand

Adds Bedrock-like third person effect on player's death

Quickly access & pin all GuideMe and Patchouli guides via buttons in your inventory

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

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

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

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

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

Make structures generate only once (configurable)

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

Adds permadeath option that deletes the world if you die

Minecraft 26.2 minibuttons (backport?) but with more features