Wheeler-Shigley

Armor-Stands with arms will have arms and those without will lack them.

SilkTouch Spawners, Trial Spawners, Vaults, Budding-Amethyst, and more; configurable.

Axolotls' "blue" variant becomes uninheritable; all blue axolotls will have been by chance! Chance is configurable, 1-in-1200 by default.

Gamerules for Sponge/Wet-Sponge range and liquids: allowing any distance removed of water/lava/powdered-snow.

Till (hoe) Podzol to convert it to dirt and drop 1-4 Leaf Litter.

Feather Falling prevents trampling Farmland; or, disable farmland being trampled, entirely!

Logs container's contents [to latest.log].

Allows some f3 information to be gained from normal gameplay: time-of-day, coordinates, and slime chunks.

Time stops when no players are online; players can be blacklisted from effecting the time-counter/day-counter.

Armor Stands start with Arms! They can be removed with Shears and replaced with Sticks.

Allows players to give/gift experience to each-other, this allows experience to be used as realistically-exchangeable currency.

Charged-Creeper's victims ALL drop heads (including players); highly configurable.

Named baby animals will never age! They cannot grow up, forever just a little guy!!! (They may be unnamed with an unnamed nametag.)