Bukkit

Gather spawners with silk touch enchanted tools. Provides the ability to change mob types.

Provides more control over Grief Prevention claims.

FixFirstLogin

Undye wool by using a cauldron.

GeometricMagic allows players to draw redstone circles on the ground to do things such as teleport and transmute blocks.

Skyblock Co-Op

Sign Utilities

Utilities for signs such as colors, copy and paste, etc.

Stack items when they drop.