WorldGuard lets you protect your server, disable or change many of Minecraft's features (such as fire spread, lava fire spread, ice formation, Endermen picking up blocks), and add new features. https://dev.bukkit.org/projects/worldguard/
Command Reference
http://wiki.sk89q.com/wiki/WorldGuard/Commands
https://github.com/downloads/sk89q/worldguard/worldguard_ref_rev2.pdf
Permissions
g:worldguard_admin:
permissions:
- worldguard.*
Download
http://dev.bukkit.org/media/files/602/772/worldguard-5.5.3.zip - latest build, (1.2.5-R4.0)
worldedit required for this plugin to work.