WorldGuard

Table of Contents

WorldGuard is a powerful plugin with a large bag of tricks for server owners, server map makers, regular survival servers, and everyone in between!

Create zones in your world that only permit mods or certain players from building within
Set additional game rules on your server (deny wither block damage, falling damage, etc.)
Set game rules on specific areas (food regen, health regen, disable PvP, TNT, control mob damage) in your world
Blacklist certain items and blocks so they can't be used
Dump useful statistics and information about your server (/wg report -p)
CPU profile your server (/wg profile -p)
Add useful commands like an immediate "STOP ALL FIRE SPREAD" command.
Works, more or less, with mods (other Bukkit plugins and FTB mods)
Protects against many types of grief (fire spread, tree growth, TNT cannons, piston machines, crop trampling, paintings and item frames, etc.), and certain interactions can also be allowed (door open, lever usage, etc.)
Well documented, and one of the oldest Minecraft projects (older than Bukkit!)
Open source
Enable only features you want! Everything is off by default. You can just install WorldGuard and configure it later.

Also, check out CraftBook

Docs | Report a Bug | Discord | GitHub

How do I install WorldGuard?

Download WorldEdit (required by WorldGuard) and move the WorldEdit.jar file into your "plugins/" folder.
Download WorldGuard and move the WorldGuard.jar file into your "plugins/" folder.
Run your server!