Buildin handlers it's free

MCL ships with a few buildin handlers which you may deactivate if you want. They use a somewhat reasonable ACL setting (permission level) but you may alter these as well. At the moment there are these buildin handlers:

Create your own custom handlers, it's really not that hard...
(Automatically) updates your minecraft server to versions you specify or just notifies on release.
Add custom (per client and/or server) MCL commands that trigger MCL commands.
Write command block stuff in a text editor and put it into the game by rightclicking a sign.
Selections, stacking and more (using 1.8 commands)
Kill entities with convenience.
Handy !tp command and teleport book.
Save coordinates (per world or global/per player or all), share them or just teleport there.
Keeps track of (and optionally notifies players about) minecraft server lag.
Switch between, create new, backup or delete existing worlds.
Gives you detailed information about a player.
Shortcuts for weather and time commands/gamerules
Some shortcuts for "creative" players
Miscellaneous commands
Collection of cheaty things (although the rest isn't really better)
Shortcuts for the /gamerule command
Shortcuts for (mostly overpowered) potion effects.
Wrapper for /enchant with partial name support.
Shortcuts for gamemodes.
MCL is a project by Sven Pachnit (contact)