I had made this plugin a while ago but never put it up on bukkit dev.
This plugin prevents griefing from hostile mobs (Creepers, Wither, Ghast etc) and is configurable to let the server owner/admin pick and choose. This was created because I was tired of /gamerule mobGriefing preventing villagers from farming and breeding (making my villager breeder I spent so much time on only to find out it didn't work useless).
This plugin will also prevent TNT from damaging blocks around (if config set to true).
Everything is set through the config file
This plugin currently supports the following:
There are currently no commands for this plugin, everything is set through the config file. May be implemented in the future
There are no permissions for this plugin. Will be added if commands are eventually added.