Bukkit

DoubleJump

Let players set blocks on fire with flaming arrows!

SelfMutilationPatch: patches a flight bypass in NoCheatPlus where they player attacks themselves to get around checks.

Planes

Make minecraft more realistic with a new approach of real life gravity !

Magica

Things players build and abandon start to accumulate cobwebs

Autoreplace used tools and blocks

CustomVillager

ObbyDestructor

removes the ability to repair tools and armor in the crafting grid.

Shorn sheep regain their wool after a while, makes sheep farms possible.

A simple, highly configurable, highly useable Instruments plugin.

Creating particles was never that easy, with using worldedit.

Warp out of minecarts

A simple plugin that allows players to toggle automatic sneaking.

Custom cobblestone generator output - fix for obsidian generator in 1.8

Keep your Item Meta even after you place your block

WorldTimer limits a players time to be in a world.

Make a chest explode when it is opened