Builder's Bag provides a useful bag which greatly improves quality of life while building.
Fancy Spawn Eggs shows a render of the mob that the egg will spawn instead of a boring egg
Subnautic Redstone allows the player to build with Redstone underwater!
Callable Horses allows players to call their horse from anywhere, like in popular RPG games
Forgotten Items adds Items with special crafting recipes, that change depending on the seed.
Extra Ambiance adds Particle Emitters, Sound Emitters, Dimmable Lights & more!
Gamemode Numbers allows the player to use /gamemode with numbers again