Google maps for block game
Two projects in one so far: to learn foreign words and read books
Old School gaming tool for GMs of AD&D/OSRIC.
Bow and Arrow BullsEye game plugin for Minecraft Bukkit servers
Avoid black Pixel-Blocks
Open Source
AdventureMap peripherals for ComputerCraft
A software to craft easily your own Minecraft mod, without coding
Mod for Minecraft | Adds Kryptonite and Kryptonite Block | By DJSyther
LetsPlay is a bukkit plugin.
Open source block game
A minecraft java mod that adds more accessibility options.
BlockOut (3D-Tetris) in java with additional preferences