Dud

Lightweight, simple creeper anti-grief
Protect the environment against those pesky griefing creepers.

Works in Singleplayer games, and multiplayer dedicated servers.
Only the host requires the mod installed.

Mod never changes the 'mobGriefing' gamerule. Only creeper explosions are changed.
Ghasts, withers, and TNT still breaks blocks.

If you're in singleplayer, 'Allow Commands' needs to be turned on.
Or if you're using an older Minecraft version, 'Allow Cheats'.

Commands:
/dud to see current status.
/dud mode 'safe/default/vanilla'

Modes:
/dud mode safe
/dud mode default
/dud mode vanilla

Safe mode protects blocks and players,
default mode protects blocks only,
vanilla mode protects nothing.